KR20180007819A - Multi-layer filter for blocking fine and yellow dust containing nanofiber web and its manufacturing method - Google Patents

Abstract

The present invention relates to a filter for blocking fine dust. The filter comprises: a nano-screen filter composed of a base material and a nanofiber web; and the base material including a mesh. The filter can effectively protect health of people from the fine dust, yellow dust, or exhaust gas. The nano-screen filter includes: the base material; and the nanofiber web manufactured as a polymer radiation solution is electrically radiated onto the base material. The mesh and the nanofiber web of the nano-screen filter are attached to each other to face each other.

Description

TECHNICAL FIELD [0001] The present invention relates to a filter for blocking multi-layer fine dusts including nanofiber webs and a method for manufacturing the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a filter for blocking fine dust, and more particularly to a filter for blocking fine dust composed of a nano-screen filter medium and a mesh (screening net) for blocking fine dust or yellow dust.

In the windows and doors installed in various buildings such as offices including ordinary households, an integrated insect screening network is installed in a frame made separately so that various kinds of insects such as mosquitoes and flies in summer can not fly into the room.

These insect screens are usually installed in a frame made of synthetic resin net made of synthetic resin in dense net shape or metal net made of dense woven wire or aluminum to prevent insects from entering the room. As well as ventilation can be done smoothly.

In the prior art for insect screen structure, Korean Utility Model Application Publication No. 1999-0035011 or Registered Utility Model No. 0382472 discloses a method for inspecting a damaged area by a simple and easy repair operation without replacing the insect screen entirely, The present invention provides a maintenance structure for an insect net that can reduce work time and economical cost, and discloses a repair structure for a screen net, which is disclosed in Korean Utility Model Publication No. 2010-3529, The double-sided tape in the form of strips provided with the releasing paper is integrally adhered to the back edge of the repaired retention net formed repeatedly, and the repair net is directly attached to the damaged area of the double- The present invention relates to an insect-proof sheet which is easy to repair.

Korean Patent Laid-Open Publication No. 2010-32078 discloses a double-sided tape which is provided adjacent to a window or a door, a double-sided tape adhered to the side surfaces of the frame, one side of the double-sided tape adhered to one side, Wherein the first and second velcro integrally formed by extrusion molding on the same surface of the binding member are folded and folded together to form a pair of first and second velcro fasteners, So that the insect net can be fixed by being fitted to the insect netting structure.

However, the above-described technique is for facilitating the repair of the insect-proof net, or for tightening the binding, and is not related to the object of the present invention for blocking fine dust or dust. Dust, fine dust, or soot are rapidly increasing every year and have a direct impact on public health, but no screening has yet been disclosed to effectively solve this problem.

Korea Public Utility Model No. 1999-0035011 Korean Registered Utility Model No. 0382472 Korean Utility Model Publication No. 2010-3529 Korean Patent Publication No. 2010-32078

An object of the present invention is to provide a filter for blocking fine dust in which a nano-screen filter material including a nanofiber web is attached to a mesh (insect-proofing net) in order to effectively block yellow dust, fine dust and soot.

According to a preferred embodiment of the present invention, a mesh; And a nano-screen filter material formed on one side of the mesh, wherein the nano-screen filter material is composed of a substrate and a nanofiber web produced by electrospinning a polymer spinning solution on the substrate, Wherein the nanofiber webs are adhered to each other so as to face each other.

The polymer spinning solution preferably includes one or more selected from the group consisting of polyvinylidene fluoride, nylon, polyurethane, polyacrylonitrile, polyethersulfone, and polyamic acid (polyimide) .

At this time, in the nanoscreen filter medium, it is preferable that the nanofiber web and the substrate are bonded together through an adhesive, and the substrate of the nanoscreen filter medium is a nylon carrier or a polyester carrier.

The nano-screen filter material and the mesh may be adhered to each other by ultrasonic bonding or an adhesive. The base material and the mesh are each coated with a phosphorus-based flame retardant and then flame-retarded.

The mesh is preferably one selected from the group consisting of a polyester mesh, a fiberglass mesh and a nylon mesh, and has a basis weight of 30 to 150 g / m 2.

The nanofiber web is manufactured by electrospinning, and the electrospinning is produced by electrospinning the polymer spinning solution through a nozzle at a high temperature of 45 to 120 DEG C by using a temperature control device.

The above-mentioned electrospinning is constituted by two or more electrospinning apparatuses, wherein a top-down type and a bottom-up type electrospinning apparatus are alternately arranged, and a rotating device is provided between the respective electrospinning apparatuses so as to rotate the laminate body, Characterized in that the fibrous web is laminated, and the nanofiber web has a basis weight of 0.001 to 2 g / m < 2 >.

Wherein the fine dust barrier filter has a fine dust collecting efficiency of 80% or more, and has an air permeability of 10 to 500 CMF and a light transmittance of 30 to 80%.

According to another preferred embodiment of the present invention, another nanofiber web is formed on a substrate on which the nanofiber web is not laminated, or the nanofiber web is formed on the substrate on which the nanofiber web is not laminated, And further comprising a mesh on the nanofiber web.

The present invention also provides a method of manufacturing a semiconductor device, comprising: preparing a substrate; Moving the substrate to an electrospinning device, electrospinning the polymer spinning solution on the substrate, and laminating the nanofiber web to produce a nanoscreen filter material; And attaching a mesh on the nanofiber web constituting the nanofiltration filter material. The present invention also provides a method for manufacturing a fine dust filter.

The base material of the nano-screen filter medium is a nylon carrier or a polyester carrier. The mesh is selected from the group consisting of a polyester mesh, a fiberglass mesh, and a nylon mesh. And the basis weight of the mesh is preferably 30 to 150 g / m < 2 >.

The step of attaching the mesh on the nanofiber web may include ultrasonic bonding or applying an adhesive. The step of laminating the nanofiber web on the substrate may include applying an adhesive on the substrate, And then electrospinning the polymer spinning solution.

In the step of electrospinning the polymer spinning solution on the base material and laminating the nanofiber web, it is preferable that the polymer spinning solution is electrospinned at a high temperature of 45 to 120 캜 through a nozzle using a temperature controller.

According to another preferred embodiment of the present invention, the step of laminating the nanofiber web by electrospinning the polymer spinning solution on the substrate comprises: electrospinning the polymer spinning solution with a top-down electrospinning device on one side of the substrate, Forming a laminate; The laminate having the first nanofiber web laminated thereon is rotated 180 degrees with the lower surface passing through the rotating device; And continuously laminating a second nanofiber web on the first nanofiber web by electrospinning a polymer spinning solution with a bottom-up electrospinning device.

It is further possible to further include attaching a mesh to the substrate on which the nanofiber web is not laminated after the step of attaching the mesh, Electrospinning the use solution to laminate another nanofiber web; And further attaching a mesh on the another nanofibrous web. The method of manufacturing a fine dust barrier filter according to claim 1, further comprising the steps of:

At this time, the nanofiber web has a basis weight of 0.001 to 2 g / m < 2 >.

The fine dust barrier filter of the present invention protects the health of the people from various kinds of fine dusts, dusts, and soot by using the nanofiber web, and also protects the secondary diseases such as respiratory system, bronchial system and lung diseases There is an effect that can be.

 Further, the filter of the present invention has an effect of shielding dust and also having an excellent air permeability.

1 is a side view schematically showing an apparatus for producing nanofibers according to the present invention,
2 is a plan view schematically showing a nozzle block installed in each electrospinning device of the nanofiber manufacturing apparatus of the present invention,
3 is a front sectional view schematically showing a state in which a heating wire for temperature control is installed in a nozzle block installed in each electrospinning device of the nanofiber manufacturing apparatus of the present invention,
4 is a sectional view taken along line AA in Fig. 3,
5 and 6 are cross-sectional views schematically showing a flip device used as an embodiment of a rotating device of a nanofiber manufacturing apparatus of the present invention,
Fig. 7 is a side view schematically showing the arrangement of the apparatus for producing nanofibers of the present invention in a vertical direction, Fig.
Fig. 8 is a bird's-eye view schematically showing the arrangement of a case where the apparatus for producing nanofibers of the present invention is arranged in U-shape with respect to the horizontal direction.
9 is a cross-sectional view of the filter for blocking fine dust particles according to the present invention.

The claims of the present invention can be divided into a case where the description of the invention is reduced, a case where the description is enlarged, an case where the description is expanded, or a case where the same description is made.

The scope of the invention is narrower than the description in the description of the invention. In contrast to the case of the reduced substrate, the extended substrate is deemed to be included in the claim scope rather than the matters described in the detailed description of the invention. This is a case where a technical scope is broadly described. The same description refers to the case where the matters described in the detailed description of the invention are similarly described in the claims.

It should be apparent that the invention is not to be construed as limited in scope.

It is to be understood that the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 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.

2 is a plan view schematically showing a nozzle block installed in each electrospinning apparatus of the nanofiber manufacturing apparatus of the present invention. FIG. 2 is a cross- 3 is a front sectional view schematically showing a state in which a heating wire for temperature control is installed in a nozzle block installed in each electrospinning device of the nanofiber manufacturing apparatus of the present invention, FIG. 4 is a sectional view taken along line AA in FIG. 3, 6 is a cross-sectional view schematically showing a flip device 20-1, which is an embodiment of a rotating device 20 used in the nanofiber manufacturing apparatus of the present invention. FIG. 7 is a cross- And FIG. 8 is a side view schematically showing a case where the nanofiber manufacturing apparatus of the present invention is arranged in a U-shape with respect to the horizontal direction. It is a bird's-eye view that I took. 9 is a cross-sectional view of the filter for blocking fine dust particles according to the present invention.

In the present invention, it is general to use a nanofiber manufacturing apparatus composed only of a bottom-up electrospinning device 10, but as shown in the figure, the nanofiber manufacturing apparatus 1 according to an embodiment of the present invention includes a bottom- A top and bottom type electrospinning device 10 and a top-down or bottom-type electrospinning device 30 are arranged at regular intervals.

The top-down or bottom-up electrospinning apparatus 10 and the bottom-up or top-down electrospinning apparatus 30 discharge the polymer spinning solution in the spinning solution main tanks 11 and 31 in which a polymer spinning solution (not shown) A nozzle block 13, 33 in which a plurality of nozzles 15, 35 in a pin shape are arranged, an upper end (in the case of a top-down or bottom-up electrospinning device) and a bottom (In the case of an electrospinning device), collectors 17, 37 spaced from the nozzles 15, 35 by a predetermined distance and collectors 17, And a generating device 14.

According to the structure as described above, the nanofiber manufacturing apparatus 1 according to the present invention can be used in the spinning liquid main tanks 11 and 31 of the top-down or bottom-up electrospinning apparatus 10 and the bottom- The spinning solution to be filled is continuously supplied in a constant quantity in the plurality of nozzles 15 and 35 to which a high voltage is applied through the metering pump and the polymer spinning solution supplied to the nozzles 15 and 35 is supplied through the nozzles 15 and 35 The nanofibers are spin-coated and collected on the collectors 17 and 37 with voltage applied thereto to form a nanofiber web, and the formed nanofiber web is embossed or needle-punched into a nonwoven fabric.

The present invention is characterized in that a nanofiber web is electrospun on a substrate by using a substrate as a support or a long sheet on a collector. The base material is preferably a polyester carrier or a nylon carrier.

At this time, the base material includes a flame retardant agent, which is subjected to a flame-retardant treatment and has excellent flame retardancy.

On the other hand, the nozzle blocks 13 and 33 in which the nozzles 15 and 35 are disposed in the respective electrospinning devices are provided with a temperature control device 60 in each tube 112. That is, in order to adjust the temperature of the polymer spinning solution in the tubular body of the nozzle blocks 13 and 33 provided in the respective electrospinning devices 10 and 30 and supplied with the polymer spinning solution by the plurality of nozzles 15 and 35, A temperature control device is provided. Here, the flow of the polymer spinning solution in the nozzle blocks 13 and 33 is supplied from the spinning liquid main tanks 11 and 31 in which the polymer spinning solution is stored to each tube through a spinning solution flow pipe (not shown). The polymer spinning solution supplied to each tube is radiated and discharged through a plurality of nozzles 15 and 35, and is accumulated on the support 3 in the form of a nanofiber web. At this time, the plurality of nozzles (15, 35), which are spaced apart from each other at a predetermined interval in the longitudinal direction, are mounted on the tubular body in a state of being electrically connected and electrically connected. Here, the temperature controller 60 is provided in the shape of a heat ray 113 on the inner circumference of the tube to control the temperature control of the polymer solution for supplying and flowing into the tubes. 3 to 5, a temperature regulating device 60 composed of a hot wire is formed on the periphery of the inside of the tubular body of the nozzle blocks 13 and 33 in a spiral manner on the inner circumference of the tubular body of the nozzle blocks 13 and 33 Thereby controlling the temperature of the polymer spinning solution supplied and introduced into the tubular body. In the present invention, it is common to spin at room temperature, but it is also possible to spin at a high temperature, preferably 45 to 120 ° C.

In an embodiment of the present invention, a temperature regulating device 60 consisting of a hot line is spirally arranged on the inner circumference of the tubular body of the nozzle blocks 13 and 33. However, the temperature regulating device 60 is formed in a hot line shape, The temperature regulating device (60) may be formed in a substantially C-shaped tube shape, and the inner circumference of the tube may be formed with a plurality of longitudinally arranged radial inner radii of the tubular body so as to control the temperature of the polymer solution. So that the temperature of the polymer spinning solution can be controlled.

A top-down or bottom-down electrospinning device 10 is disposed at a front end of the nanofiber manufacturing apparatus 1, and a bottom-up or bottom-down electrospinning device 30 is disposed at a rear end thereof. A feed roller 5 for feeding a support 3 on which nanofibers are laminated and a winding roller 5 for winding a support 3 on which nanofibers are laminated are provided at the rearmost end of the nanofiber manufacturing apparatus 1 9 are provided.

In the present invention, as described above, it is preferable to use one selected from the group consisting of a polyester carrier and a nylon carrier as a substrate. The basis weight of the carrier is preferably 10 to 50 g / m < 2 >. If the basis weight is less than 10 g / m < 2 >, the physical properties of the base material of the nanoscreen filter medium deteriorate. If the basis weight exceeds 50 g / m & there was.

The top-down or bottom-down electrospinning apparatus 10 and the bottom-up or top-down electrospinning apparatus 30 of the present invention are arranged symmetrically with respect to the collectors 17 and 37 in the upward and downward directions, respectively. That is, in the top-down or bottom-up electrospinning apparatus 10, the collector 17 is located at the top of the nozzle 15, and the bottom-up or top-down electrospinning apparatus 30 is arranged such that the collector 37 is located at the bottom of the nozzle 35 Located.

On both sides of the collectors 17 and 37, conveying rollers 7 are provided and the nano-fibers are stacked on the respective collectors 17 and 37 via the conveying rollers 7, (3) is transported in the horizontal direction. That is, nanofibers prepared by laminating the polymer spinning solution injected from the nozzles 15 of the top-down or bottom-up electrospinning device 10 on the support 3 of the collector 17 can be used as a bottom- 30 on the collector 37 and conveying rollers 7 for repeatedly and continuously advancing the above-described process are provided at both ends of the respective collectors 17, 37, respectively.

In the meantime, the present invention is characterized in that a rotary device 20 is provided between a top-down or bottom-up electrospinning device 10 and a bottom-up or top-down electrospinning device 30. The rotating device 20 is disposed between the electrospinning devices and rotates the supporting body 3 by 180 degrees so that the upper surface of the support body is rotated to the lower surface and the lower surface is rotated to the upper surface to be.

5 and 6 are cross-sectional views schematically showing a flip device 20-1 used as an embodiment of a rotating device. 5 is a cross-sectional view showing an initial operation of the flip device 20-1, and FIG. 6 is a cross-sectional view showing a process of the flip device 20-1 in the latter stage of operation.

The flip device 20-1 used as an embodiment of the rotating device is formed as a cylindrical body having a hollow inside and is provided at its central portion with both ends of the support 3 inserted in the horizontal both- Left and right guide members 21 and 21 having guide grooves are formed so as to protrude inwardly. The left guide member 21 of the left and right guide members 21 and 21 formed to protrude inwardly from the inner periphery of the flip device 20-1 is formed to extend upward along the inner periphery, So that the right guide member 21 is extended in the downward direction along the inner periphery and then spirally rotated so as to extend upward in the upward direction And is located at the initial position and direction of the left guide member 21. [

The one end and the other end of the support inserted into the guide grooves 22 and 22 of the left and right guide members protruding inwardly from the inner periphery of the flip device 20-1 by the above- The upper and lower surfaces of the support body 3 are reversed by rotating the inner periphery of the flip device 20-1 in a spiral manner so as to face each other while being guided by the right guide members 21 and 21.

In the present invention, the flip device 20-1 is used as the rotating device 20 for rotating the electrospun nanofibers 180 degrees between the electrospinning devices. However, the present invention is not limited to this, and a device having a twist roller It is also possible to use an apparatus that rotates by 90 degrees in the advancing direction of the support by the torsion roller.

The polymeric spinning solution filled in the spinning liquid main tank 11 of the top-down or bottom-up electric device 10 is injected through the nozzle 15 onto the support 3 of the collector 17 or onto the base material The support (3) or the substrate on which nanofiber webs are laminated to form nanofiber filter media after lamination of nanofiber webs are stacked on the support (3) of the collector (17) The lower surface of the support 3 on which the nanofibers are laminated by the top-down or top-down electrospinning is rotated 180 degrees by the rotation device 20 to the upper surface. And then transferred onto the collector 37 of the bottom-up or top-down electrospinning device 30 via the transport roller 7 and the support 3, on which the nanofibers transferred onto the collector 37 are laminated, The polymer spinning solution filled in the spinning liquid main tank 31 of the top-down electrospinning device 30 is electrospun through the nozzle 35, and the above-mentioned process is continuously and repeatedly performed to produce the final product.

The nano-fiber manufacturing apparatus 1 according to the present invention has the structure as described above. The nano-fiber manufacturing apparatus 1 includes a top-down or bottom-up electrospinning apparatus 10, a rotating apparatus 20, and a nano- The fibrous web is injected into the support 3 through the nozzles 15 and 35 of the top-down or bottom-up electrospinning apparatus 10 and the bottom-up or top-down electrospinning apparatus 30, The polymer spinning solution which is sprayed from the nozzles 15 and 35 of the top-down or bottom-up electrospinning apparatus 10 and the bottom-up or top-down electrospinning apparatus 30 such that the nanofibers are continuously laminated on one surface of the support 3 And the nanofibers are formed in multiple layers.

According to an embodiment of the present invention, the voltage of the top-down or bottom-up electrospinning apparatus is higher than the voltage of the bottom-up or top-down electrospinning apparatus so that the diameter of the nanofibers produced by the top- It is possible to fabricate the nanofibrous web with a diameter smaller than the diameter of the nanofiber web produced by the top-down electrospinning device 30.

In the meantime, it is possible to fill the spinning liquid main tanks 11 and 31 of the top-down or bottom-up electrospinning apparatus 10 and the bottom-up or top-down electrospinning apparatus 30 with the same type of polymer spinning solution, The nanofibers produced through the nanofiber manufacturing apparatus 1 can be variously manufactured according to the characteristics by filling the polymer spinning solution.

In the present invention, the polymer spinning solution injected from the top-down or bottom-up electrospinning device 10 and the polymer solution injected from the bottom-up or top-down electrospinning device 30 can be made of the same or different kinds of polymer spinning solution.

Here, the polymer spinning solution is not particularly limited, and examples thereof include polypropylene (PP), polyethylene terephthalate (PET), polyvinylidene fluoride, nylon, polyvinyl acetate, polymethylmethacrylate, (PAN), polyurethane (PUR), polybutylene terephthalate (PBT), polyvinyl butyral, polyvinyl chloride, polyethyleneimine, polyolefin, polylactic acid (PLA), polyvinyl acetate (PEN), polyamide (PA), polyvinyl alcohol (PVA), polyethyleneimide (PEI), polycaprolactone (PCL), polylactic acid glyceric acid (PLGA), silk, cellulose and chitosan. (PP) materials and heat-resistant polymeric materials such as polyamide, polyimide, polyamideimide, poly (meta-phenylene isophthalamide), polysulfone, polyether ketone, polyether Aromatic polyesters such as imide, polyethylene terephthalate, polytrimethylene terephthalate and polyethylene naphthalate, polytetrafluoroethylene, polydiphenoxaphospazene, polybis [2- (2-methoxyethoxy) ], A polyurethane copolymer containing polyurethane and polyether urethane, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, etc., are preferably used in a commercial manner .

More preferably, one or more selected from the group consisting of polyvinylidene fluoride, nylon, polyurethane, polyacrylonitrile, polyethersulfone and polyamic acid (polyimide) is preferable.

The polyurethane (PU) has an isocyanate group (-N═C═O) easily bonded to a hydroxyl group (-OH) (urethane bond) as shown in Reaction Scheme 1 below. When a molecule having two hydroxyl groups is reacted with diisocyanate using this reaction, a linear polymer is obtained. This polymer is polyurethane. Generally, toluene diisocyanate is used as the diisocyanate, and polyether or polyester is used as the molecule having the hydroxyl group (polyol). Using a polyether makes it smoother, and using polyester makes it harder. The polyurethane made by using a molecule having three or more hydroxyl groups as a polyol is three-dimensionally bonded.

[Reaction Scheme 1]

Polyurethane having such a structure is not deformed by heat, and the reaction of diisocyanate is rapid in molding. Therefore, casting is generally used, and gear wheels and pipes are made. Typical applications are synthetic fibers or paints . Synthetic fibers are often called spandex and are covered with fibers such as nylon and are used in underwear, socks, and swimwear. Polyurethane has a bubble structure, so it has elasticity, firmness and lightness. Therefore, it can be used on mattresses, fabrics, etc., as well as on the wings of airplane wings.

Also, paints made of polyurethane (polyurethane resin (paint)) have strong adhesion, water resistance and corrosion resistance.

The polyimide (PI) is a polymer containing an imide group in the repeating unit and has a characteristic that the physical properties do not change even in a wide temperature range from -273 ° C. to 400 ° C., and the mechanical strength and heat resistance are excellent . However, most of the polyimides are insoluble and have poor physical properties and are difficult to process by conventional techniques, so it is common to process them in the form of its precursor poly (amic acid) (PAA). Therefore, the polyimide is prepared by first polymerizing a polyamic acid and then carrying out an imidation process.

Generally, polyimides are prepared by a two step reaction.

The first step is a step of synthesizing polyamic acid. The polyamic acid is polymerized by adding a dianhydride to a reaction solution in which diamine is dissolved. In order to increase the degree of polymerization, the reaction temperature, the water content of the solvent, Purity control is required. Organic polar solvents such as dimethylacetamide (DMAc), dimethylformamide (DMF) and en-methyl-2-pyrrolidone (NMP) are mainly used as the solvent used in this step. Examples of the diamine include 4,4'-oxydianiline (ODA), para-phenylene diamine (p-PDA), and o-phenylene diamine diamine, o-PDA) may be used. Examples of the anhydride include pyromellitic dianhydride (PMDA), benzophenonetetracarboxylic dianhydride (BTDA), 4-4'-oxydiphthalic anhydride (4-4 ' bisdiphthalic anhydride (ODPA), biphenyl-tetracarboxylic acid dianhydride (BPDA), and bis (3,4'-dicarboxyphenyl) dimethylsilanediamine hydride (bis (3,4-dicarboxyphenyl) dimethylsilane dianhydride, SIDA).

[Reaction 1] Preparation of polyamic acid

The weight average molecular weight (Mw) of the polyamic acid prepared by the above method is preferably 10,000 to 500,000. If the molecular weight of the polyamic acid is less than 10,000, sufficient physical properties for forming the nanofiber nonwoven fabric can not be obtained. If the molecular weight exceeds 500,000, the handling of the solution is not easy and the processability is degraded.

The second step is the dehydration and ring-closing reaction step of producing the polyimide from polyamic acid as the following four methods.

In the re-impregnation method, a polyamic acid solution is added to an excess amount of a poor solvent to obtain a solid polyamic acid. As the re-precipitation solvent, water is mainly used, but toluene or ether is used as a co-solvent.

The chemical imidization method is a method in which a imidization reaction is chemically performed using a dehydration catalyst such as acetic anhydride / pyridine, and is useful for producing a polyimide film.

The thermal imidization method is a method in which the polyamic acid solution is heated to 150 to 350 ° C to thermally imidize it. In the simplest process and the crystallization degree is high, the amine exchange reaction occurs when the amine type solvent is used. have.

Finally, the isocyanate method uses a diisocyanate instead of a diamine as a monomer. When the monomer mixture is heated to a temperature of 120 ° C or higher, a polyimide is produced while CO 2 gas is generated.

[Reaction formula 2] Preparation of polyimide

Examples of the solvent usable with the polyimide include acetone, tetrahydrofuran, methylene chloride, chloroform, N-dimethylformamide (DMF), N, N-dimethylacetamide (DMAc) N-methyl pyrrolidone (NMP), cyclohexane, water, or a mixture thereof, but the present invention is not limited thereto.

The polyvinylidene fluoride (PVDF) is one of fluorine-based polymers, and the fluororesin contains fluorine, which is excellent in thermal and chemical properties.

[Reaction Scheme 1]

The polyvinylidene fluoride is prepared in the same manner as in the above Reaction Scheme 1, and the vinylidene chloride monomer is prepared by free radical vinyl polymerization to produce polyvinylidene fluoride.

In addition, polyvinylidene fluoride has lower melting point, lower density, lower cost, and more chemical stability than other fluorinated resins, and is used for electric insulators and high-grade paints applied to the exterior walls of buildings.

Polyvinylidene fluoride is a representative organic material exhibiting piezoelectricity, and many studies have been conducted since the 1960s. In the polyvinylidene fluoride polymer, four kinds of crystals are mixed, and it is divided into at least four types of α, β, γ and δ type depending on crystal form. Among them, the? -Form crystal of polyvinylidene fluoride has a trans-type molecular chain filled in parallel, and all the permanent dipoles of the monomers are aligned in one direction, and exhibit large spontaneous polarization. This means that the polyvinylidene fluoride molecules can be regularly arranged through stretching to give piezoelectricity by giving anisotropy to the aggregated state. In order to improve such piezoelectric characteristics, various methods for increasing the? -Form crystal in the polyvinylidene fluoride fiber have been studied. In general, melt spinning systems have been applied to produce polyvinylidene fluoride fibers. However, it is expensive to construct melt spinning equipment, and the size of fibers produced by melt spinning is limited.

 Due to the coagulation mechanism of wet spinning, fibers prepared by wet spinning have a significantly higher β-form crystal ratio in the fiber at the initial stage of spinning than the α-form crystal ratio, and the spinning speed is slower than the melt spinning. However, It also has the advantage of reducing fiber size. In addition, wet spinning has the advantage of improving physical properties through continuous post-treatment processes (stretching, crimping, etc.).

 For wet spinning, the polymer is dissolved in a solvent to make a spinning solution, and the spinning solution is discharged through a gear pump and spinning nozzle into a coagulation bath containing an aqueous solution containing a solvent. As the discharged spinning liquid phase and the co-diffusion with the solvent and the precipitating agent in the coagulating bath occur, the precipitating agent penetrates into the spinning liquid phase and phase separation and precipitation occur in the three-component system of the polymer-solvent-precipitating agent, Is obtained. Such a wet spinning system has the advantage of enhancing the mechanical properties of fibers by orienting the polymer in a fiber direction by stretching and tensioning in a spinning bath.

 The polyvinylidene fluoride may be a homopolymer of vinylidene fluoride or a copolymerized polymer containing vinylidene fluoride in a molar ratio of 50% or more in preparing a spinning liquid in which the polyvinylidene fluoride is dissolved in an appropriate organic solvent It is more preferable that the homopolymer is excellent in strength of the polyvinylidene fluoride resin. When the polyvinylidene fluoride resin is a copolymer polymer, as the other copolymerizable monomer copolymerized with the vinylidene fluoride monomer, And a fluorine-based monomer, a chlorine-based monomer, and the like can be suitably used. The weight average molecular weight (Mw) of the polyvinylidene fluoride resin is not particularly limited, but is preferably 10,000 to 500,000, more preferably 50,000 to 500,000.

When the weight average molecular weight of the polyvinylidene fluoride resin is less than 10,000, sufficient physical properties for forming a nonwoven fabric can not be obtained. When the weight average molecular weight exceeds 500,000, the solution is not easily handled, It is difficult to obtain a nonwoven fabric.

[Reaction Scheme 1]

Polyacrylonitrile (PAN) refers to a polymer of acrylonitrile (CH 2 = CHCN), which is obtained by reacting as in Scheme 1. Polyacrylonitrile resins are copolymers made from a mixture of acrylonitrile and monomers that make up the majority. Frequently used monomers include butadiene styrene vinylidene chloride or other vinyl compounds. The acrylic fiber contains at least 85% acrylonitrile, and the mode acrylic contains 35 to 85% acrylonitrile. When other monomers are included, the fiber has the property of increasing the affinity to the dye. More specifically, in the production of an acrylonitrile-based copolymer and spinning solution, in the case of producing an acrylonitrile-based copolymer, there is little contamination of nozzles in the course of manufacturing ultrafine fibers by electrospinning, Thereby increasing the solubility in the solvent and imparting better mechanical properties. In addition, polyacrylonitrile has a softening point of 300 ° C or more and is excellent in heat resistance.

The degree of polymerization of the polyacrylonitrile is preferably 1,000 to 1,000,000, and more preferably 2,000 to 1,000,000.

The polyacrylonitrile is preferably used within a range that satisfies the use amount of the acrylonitrile monomer, the hydrophobic monomer and the hydrophilic monomer. When the polymer is polymerized, the weight% of the acrylonitrile monomer is too low to be electrospun when the weight% of the hydrophilic monomer and the weight% of the hydrophobic monomer are 3: 4 and the total monomer is less than 60, It is difficult to form a stable jet (JET) at the time of electrospinning as well as to cause contamination of the nozzle. If the ratio is more than 99, the spinning viscosity is too high to spin, and even if an additive capable of lowering the viscosity is added, the diameter of the microfine fibers becomes too large and the productivity of electrospray is too low to achieve the object of the present invention.

In addition, as much amount of comonomer is added to the acrylic polymer, the amount of crosslinking agent must be increased to secure the stability of electrospinning and to prevent deterioration of the mechanical properties of the nanofiber.

The hydrophobic monomer may be an ethylene-based compound such as methacrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, vinyl acetate, vinyl pyrrolidone, vinylidene chloride or vinyl chloride, It is preferable to use at least one selected.

Wherein the hydrophilic monomer is selected from the group consisting of acrylic acid, allyl alcohol, methallyl alcohol, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, butanediol monoacrylate, dimethylaminoethyl acrylate, butent ricarboxylic acid, vinyl It is preferable to use at least one selected from ethylene-based compounds such as sulfonic acid, allylsulfonic acid, methallylsulfonic acid, and para-styrenesulfonic acid and polyvalent acids or derivatives thereof.

As the initiator to be used for preparing the acrylonitrile-based polymer, an azo-based compound or a sulfate compound may be used, but it is generally preferable to use a radical initiator used for the oxidation-reduction reaction.

Examples of the solvent usable with the polyacrylonitrile include acetone, tetrahydrofuran, methylene chloride, chloroform, dimethylformamide (DMF), N-dimethylacetamide (DMAc), N N-methyl pyrrolidone (NMP), cyclohexane, water, or a mixture thereof. However, the present invention is not limited thereto.

As the solvent usable with the polyacrylonitrile, it is preferable to use N, N-Dimethylformamide (DMF).

The nylon (Nylon (large category is Polyamid)) is an amber transparent non-crystalline resin having the following repeating unit, and is generally produced by the condensation polymerization of dichlorodiphenylsulfone.

[Reaction 1] Nylon 6 polymerization of caprolactam

On the other hand, nylon 66 is generally similar in properties to nylon 6, but is superior in heat resistance to nylon 6 and superior in self-extinguishing and abrasion resistance. Nylon 66 is prepared by dehydration condensation polymerization of hexamethylenediamine and adipic acid.

[Reaction Scheme 2] Dehydration condensation polymerization of hexamethylenediamine with adipic acid Nylon 66 polymerization

Nylon is generally referred to as polyamide, and polyamide refers to a generic term for polymers linked by an amide bond (-CONH-), which can be obtained by condensation polymerization of a diamine and a dicarboxylic acid. Polyamides are characterized by amide bonds in the molecular structure, and their physical properties vary depending on the ratio of amide groups. For example, when the ratio of amide groups in the molecule is increased, specific gravity, melting point, absorbency, rigidity and the like are increased.

In addition, polyamide is a material used in a wide range of fields such as clothing, tire cord, carpet, rope, computer ribbon, parachute, plastic and adhesive due to its excellent resistance to corrosion, abrasion resistance, chemical resistance and insulation.

Generally, polyamides are classified into aromatic polyamides and aliphatic polyamides. Representative aliphatic polyamides include nylon. Nylon is originally a trademark of DuPont, Inc., but is now used as a generic name.

Nylon is a hygroscopic polymer and is sensitive to temperature. Representative nylons include nylon 6, nylon 66, and nylon 46.

First, nylon 6 is characterized by excellent heat resistance, moldability and chemical resistance, and is produced by ring-opening polymerization of ε-caprolactam in order to produce it. Nylon 6 is because of the number of carbon atoms in caprolactam 6. It is a super heat-resistant engineering plastic developed by ICI in the UK. It is a highly heat-resistant polymer among thermoplastic plastics. Since the nylon is amorphous, the physical properties due to the temperature rise are small, and the temperature dependency of the flexural modulus is small. Therefore, the nylon hardly changes at -100 to 200 ° C. The load-strain temperature is 200 to 220 占 폚, and the glass transition temperature is 225 占 폚. In addition, the creep resistance up to 180 占 폚 is the most excellent among the thermoplastic resins, and has the characteristic of being resistant to hot water and steam at 150 to 160 占 폚.

Nylon 46 is also excellent in heat resistance, mechanical properties and impact resistance, and has a high processing temperature. Nylon 46 is prepared by polycondensation of tetramethylenediamine and adipic acid. Diaminobutane (DAB), a raw material, is prepared from the reaction of acrylonitrile with hydrogen cyanide. In the first stage of the polymerization operation, a salt is formed from diaminobutane and adipic acid, and the mixture is polymerized under appropriate pressure The prepolymer is converted into a prepolymer and the solid of the prepolymer is polymerized at a solid state by treatment at about 250 ° C in the presence of nitrogen and water vapor.

In particular, nylon 46 exhibits excellent properties with a high amide concentration and a regular arrangement between the methylene and amide groups. The melting point of nylon 46 is about 295 ° C, which is higher than that of other types of nylon, and has attracted attention as a resin having excellent heat resistance due to the above characteristics.

Examples of the solvent usable with the nylon include acetone, tetrahydrofuran, methylene chloride, chloroform, dimethylformamide (DMF), dimethylacetamide (DMAc), N-methyl- N-methyl pyrrolidone (NMP), cyclohexane, water, or a mixture thereof. However, the present invention is not limited thereto.

As the solvent usable with the nylon, it is preferable to use formic acid.

The polyethersulfone (PES) is an amber transparent, amorphous resin having the following repeating units, and is generally produced by condensation polymerization of dichlorodiphenylsulfone.

[Reaction Scheme 1]

Polyethersulfone is a super heat resistant engineering plastic developed by ICI in the UK. It is a highly heat resistant polymer among thermoplastic plastics. Since the polyethersulfone is amorphous, the physical properties of the polyether sulfone are not lowered by temperature rise, and the temperature dependency of the flexural modulus is small, so that it hardly changes at -100 to 200 캜. The load-strain temperature is 200 to 220 占 폚, and the glass transition temperature is 225 占 폚. In addition, the creep resistance up to 180 占 폚 is the most excellent among the thermoplastic resins, and has the characteristic of being resistant to hot water and steam at 150 to 160 占 폚.

Due to such characteristics, polyethersulfone is used in optical disks, magnetic disks, electric and electronic fields, hydrothermal fields, automobile fields, and heat resistant paints.

Examples of the solvent usable with the polyethersulfone include acetone, tetrahydrofuran, methylene chloride, chloroform, dimethylformamide (DMF), dimethylacetamide (DMAc), N- N-methyl pyrrolidone (NMP), cyclohexane, water, or a mixture thereof, but the present invention is not limited thereto.

On the other hand, the spinning solution is prepared by dissolving the polymer in a solvent, and the type of the solvent is not limited as long as it can dissolve the polymer. Examples thereof include phenol, formic acid, sulfuric acid, m-cresol, thiuoroacetone and hydride Methyl ethyl ketone, methyl ethyl ketone, aliphatic hydroxyl group, m-butyl alcohol, isobutyl alcohol, isobutyl alcohol, isobutyl alcohol, isobutyl alcohol, isobutyl alcohol, Propylene glycol, diethylene glycol, ethylene glycol, halogen compounds such as trichlorethylene, dichloromethane, aromatic compounds such as toluene, toluene, and the like, , Xylene, aliphatic cyclic compound groups such as cyclohexanone, cyclohexane and ester groups such as n-butyl acetate, ethyl acetate, aliphatic As the ether group, butyl cellosolve, acetic acid 2-ethoxy ethanol, 2-ethoxy ethanol, dimethyl amide dimethyl formamide, dimethylacetamide and the like can be used, and a plurality of kinds of solvents can be mixed and used. The polymer spinning solution preferably contains, but is not limited to, an additive such as a conductivity improver.

The polymeric spinning solution filled in the spinning liquid main tank 11 of the bottom-up electrospinning device 10 and the polymer spinning solution filled in the spinning solution main tank 31 of the top-down electrospinning device 30 It is possible to have the same or different kinds of kinds.

Basis Weight or Grammage, on the other hand, is defined as the mass per unit area, that is, the preferred unit, grams per square meter (g / m 2). The basis weight of the nanofiber web prepared on the nylon mesh according to the present invention is preferably 0.001 to 2 g / m < 2 >. If the basis weight is less than 0.001 g / m < 2 >, the mechanical properties are deteriorated. If the basis weight is more than 2 g / m &

Thereafter, a laminate of a base material and a nano-fiber web manufactured through the top-down or bottom-up electrospinning apparatus 10 and the bottom-up or top-down electrospinning apparatus 30 constituting the apparatus for manufacturing nanofibers according to an embodiment of the present invention is laminated The laminating apparatus 50 is further provided at the rear end of the apparatus 1 for manufacturing nanofibers according to the present invention and performs a post-process.

The top-down or bottom-up electrospinning apparatus 10 and the bottom-up or bottom-down electrospinning apparatus 30 constituting the nanofiber manufacturing apparatus 1 may be arranged in parallel to one another in the horizontal direction, And the respective electrospinning devices are arranged in the U direction in the same layer. The fact that they can be arranged in the vertical direction for each layer or in the U direction in the same layer has the advantage that the productivity can be increased in a limited area.

That is, the rotary device is characterized in that the support rotates 180 degrees or vertically rotates in the U-turn direction by the flip device.

Meanwhile, in one embodiment of the present invention, a laminating device 50 is provided at the rear end of the nanofiber manufacturing apparatus 1 and is manufactured through the bottom-up electrospinning device 10 and the top-down electrospinning device 30, (Not shown) for supplying the mesh (insect control net) of the present invention to the lower side of the laminating device 50 is provided on the base material-nano fiber web, And a fiber web mesh (insect control net) in this order. At this time, the nano screen media and the mesh (screening net) are preferably adhered by an adhesive according to an embodiment of the present invention, but they are preferably adhered through ultrasonic bonding.

According to an embodiment of the present invention, an adhesive may be applied and adhered between the substrate and the nanofiber web forming the nanoscreen filter medium. After the adhesive is electrospun on the substrate to form an adhesive layer, It is preferable that the spinning solution is electrospun to form a nanofiber web.

As the adhesive, a commercially available adhesive can be used. However, a low melting point polymer solution can be used. As the low melting point polymer solution, a low melting point polyvinylidene fluoride, a low melting point polyurethane or a low melting point nylon Is preferably used. The low-melting-point polymer solution preferably has a weight average molecular weight of 5000 to 15000 and a melting point of 80 to 160 ° C. When the molecular weight is less than 5,000, there is a problem that the adhesive strength is lowered. When the molecular weight is more than 15,000, it is not easily melted by heat and thus it is difficult to serve as an adhesive. When the melting point is lower than 80 ° C, it is difficult to use because of poor handling property. When the melting point is higher than 160 ° C, it is not easily melted at the laminating temperature and it is difficult to serve as an adhesive.

On the other hand, examples of the adhesive include an epoxy resin, a curing agent solution, and the like.

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 Poylamine (Ketimine).

Examples of the aromatic amine include, but are not limited to, Meta phenylene diene (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] Nonene-5 (DBN), and the like.

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 sulfonate include p-toluenesulfonate, benzenesulfonate, methanesulfonate and ethanesulfonate. 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 (II) acetylacetonate Organic iron complexes such as iron (III) acetylacetonate, organic nickel complexes such as nickel (II) acetylacetonate, and organic manganese complexes 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 Cobalt (II) acetylacetonate, and zinc naphthenate are particularly preferred. 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% Do. 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 branched 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; Cyclohexanetetracarboxylic acid, bicyclo [2.2.1] heptane-2,3-dicarboxylic acid, methylbicyclo [2.2.1] heptane-2,3-dicarboxylic acid 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. Among them, an aliphatic monocarboxylic acid having 10 to 18 carbon atoms and an alicyclic polycarboxylic acid having 8 to 18 carbon atoms are preferable as the carboxylic acid.

Examples of the "organic sulfonic acid" in the "anion residue of a carboxylic acid or an organic sulfonic acid" include methanesulfonic acid, ethanesulfonic acid, 1-propanesulfonic acid, 2-propanesulfonic acid, Aliphatic sulfonic acids such as sulfonic acid, 1-hexanesulfonic acid, 1-octanesulfonic acid, 1-decanesulfonic acid and 1-dodecanesulfonic acid (for example, aliphatic sulfonic acids having 1 to 16 carbon atoms); Benzene sulfonic acid, p- toluenesulfonic acid, 4-ethylbenzenesulfonic acid, 3- (straight or branched octyl) benzenesulfonic acid, 4- (straight or branched octyl) benzenesulfonic acid, 3- (linear or branched dodecyl Benzene sulfonic acid, 4-methoxybenzenesulfonic acid, 4-ethoxybenzenesulfonic acid, 4-methoxybenzenesulfonic acid, 4-methoxybenzenesulfonic acid, -Chlorobenzenesulfonic acid, and the like.

Typical examples of the quaternary phosphonium salts include tetrabutylphosphonium decanoate, tetrabutylphosphonium laurate, tetrabutylphosphonium myristate, tetrabutylphosphoniumpolate, tetrabutylphosphonium cation and bicyclor [2.2 .1] heptane-2,3-dicarboxylic acid and / or methyl bicyclo [2.2.1] heptane-2,3-dicarboxylic acid, a salt of an anion of tetrabutylphosphonium cation, Salts of anions of 4,5-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- Salts of anions of 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, -Benzyl-2-phenylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-undecylimidazole, 1-cyanoethyl- 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- diamino-6- [ (1 ')] - ethyl-s-triazine, 2,4-diamino-6- [2'-ethyl-4'-methylimidazolyl- , 2,4-diamino-6- [2'-methylimidazolyl- (1 ')] -ethyl-s-triazine as an isocyanuric acid adduct, 2- 2-phenyl-4-methyl-5-hydroxymethylimidazole, 2,3-dihydro-imidazole, Imidazole compounds such as 1H-pyrrolo [1,2-a] benzimidazole, 1-dodecyl-2-methyl-3-benzylimidazolium chloride, 2-methylimidazoline and 2-phenylimidazoline And adducts of an imidazole compound and an epoxy resin.

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

The mesh (insect control net) according to the present invention means a fiber used for a mesh (insect control net), and it is preferable to use a mesh (insect net) type mesh (insect control net) composed of polyester fibers. Although the mesh made of iron (insect screen) has a solid advantage, it is preferable to use it as a mesh (insect screen) base material using plastic is becoming popular. As the material of the mesh (insect control) base material, it is preferable to use one kind selected from the group consisting of polyester mesh, glass fiber mesh and nylon mesh, and the basis weight is preferably 30 to 150 g / m 2. If the basis weight is less than 30 g / m < 2 >, the physical properties of the filter support decrease. If the basis weight exceeds 150 g / m < 2 >, the stiffness is high,

On the other hand, the base material and the mesh (screening net) of the present invention are preferably non-toxic and have a flame retardant effect in a fire to maximize flame retardant effect of the product, and to ensure the reliability of the product during the fire and to improve the quality of the product Do.

More specifically, 5-50 wt% of an inorganic flame retardant, 5-20 wt% of a cationic urethane, 1-70 wt% of water and 1-10 wt% of other additives are mixed with each other, and then the mixture is homogenized for 5-10 minutes The flame-retardant coating material is mixed and applied to a base material or a mesh (screening net) to prevent infiltration of fine dust and insect pests. Also, it is possible to prevent the fire from being expanded by the flame-retardant coating material or the generation of toxic gas even when a fire occurs.

The flame retardant coating agent protects the product more effectively and continuously from the fire than the conventional flame retardant agent, thereby enhancing the flame resistance and physically and chemically improving the flame-retardant product, thereby minimizing the burning of the product by the flame retardant coating agent will be.

 Therefore, the flame retardant coating agent is excellent in flame retardant performance by promoting carbonization and formation of a protective film by using a polyol containing phosphorus (P) or a halogen component, and the flame retardant coating agent is a water-soluble emulsion type environmentally friendly and non- Therefore, it is possible to manufacture a flame retardant coating agent suitable for application to a substrate or a mesh (screening net) with an excellent flame retardant durability superior to the conventional flame retardant agent.

On the other hand, in the process of constructing the nanoscreen filter material by placing the base material on the nanofiber manufacturing apparatus as described above and electrospinning the polymer spinning solution directly on the base material to laminate the nanofiber web, an adhesive is applied between the base material and the nanofiber web It is preferable to include a process of coating. When an adhesive is applied, separation between the nanofiber web and the substrate does not occur, so it is preferable to use the adhesive. The adhesive may be applied by a coating method or by partially applying an adhesive on a base material, and it is also possible to use the adhesive by electrospinning.

On the other hand, when the nanofilter filter material is manufactured, the fine dust barrier filter of the present invention is manufactured through a process of attaching the mesh (insect control net) to one surface of the nanofiber web. That is, as shown in FIG. 9, it is preferable that the nanofiber web of the nanofilter media is positioned between the substrate and the mesh (insect control net) so that the nanofiber web is not exposed to the outside. Here, it is preferable that the method of attaching the mesh (screening net) and the nanoscreen filter media is performed using an adhesive or ultrasonic bonding.

The fine dust blocking filter composed of the nanoscreen filter material and the mesh (insect control net) manufactured through the above-mentioned electrospinning has the effect of effectively blocking the inflow of dust, insects and the like including fine dust.

The filter for blocking fine dust as described above is characterized in that the fine dust collecting efficiency is 80% or more, the air permeability is 10 to 500 CFM, and the light transmittance is 30 to 80%.

On the other hand, the fine dust barrier filter may further include a mesh (screening net) on a substrate on which the nanofiber web is not laminated. By further including the mesh (insect control net), the mechanical properties of the filter can be improved.

In addition, the fine dust barrier filter may further comprise another nanofiber web on the substrate on which the nanofiber web is not laminated, and may further include a mesh on the another nanofiber web. That is, the filter for blocking fine dust may be composed of five layers in the form of a first mesh (insect control net), a first nanofiber web, a substrate, a second nanofiber, and a second mesh (screening net).

In the case of the filter for blocking fine dust composed of five layers as described above, the basis weight of the first mesh (insect control net) and the second mesh (insect control net), the weights of the first nanofiber web and the second nanofiber web are adjusted Thus, the collection efficiency can be effectively improved.

Hereinafter, a method of manufacturing a filter for blocking fine dust according to an embodiment of the present invention will be described.

Generally, it is preferable to use a bottom-up electrospinning device. Therefore, it is preferable to fabricate nanofilter media by laminating nanofiber webs by electrospinning a polyimide spinning solution through a bottom-up electrospinning device on a substrate. As the base material, it is preferable to use a nylon carrier or a polyester carrier.

However, according to an embodiment of the present invention, the base material is supplied to the bottom-up electrospinning apparatus 10 through the feed roller 5 provided at the tip of the nanofiber manufacturing apparatus 1 according to an embodiment of the present invention.

On the other hand, the support 3, which is fed through the feed roller 5 to the top-down or bottom-up electrospinning apparatus 10, is positioned on the bottom surface of the collector 17. At this time, a high voltage of the voltage generator (not shown) is generated on the nozzle 15 and the collector 17, and the polymer spinning solution filled in the spinning liquid main tank 11 on the collector 17 flows into the nozzle block 13 via a nozzle 15.

Here, the spinning liquid to be filled in the spinning liquid main tank 11 is continuously supplied in a constant amount into a plurality of nozzles 15 to which a high voltage is applied through a metering pump (not shown) The spinning solution is radiated and focused on the collector 17 with a high voltage applied thereto through the nozzle 15 and the first nanofiber web is laminated on the lower surface of the substrate.

As described above, the substrate on which the first nanofiber web is laminated on the lower surface thereof via the top-down or bottom-up electrospinning device 10 is then moved to the rotating device 20. [

As the lower surface of the base material on which the first nanofiber web is laminated on the lower surface is rotated 180 degrees to the upper surface while passing through the rotating device 20, the first nanofiber web located on the lower surface of the substrate is reversed do.

As described above, the substrate whose lower surface is rotated to the upper surface through the rotating device 20 is then fed to the bottom-up or top-down electrospinning device 30 by the conveying roller 7, ) Is located on the upper surface of the collector 37. The collector 37 is provided on the upper surface thereof.

The high voltage of the voltage generator is generated in the nozzle 35 and the collector 37 and the polymer spinning solution filled in the spinning liquid main tank 31 on the collector 37 generating the high voltage is supplied to the nozzle block 33 Through the nozzle 35 of the spray nozzle.

Each of the voltage generators has a structure similar to that of a general electrospinning device and generates a high voltage in the collectors 17 and 37 through the nozzles 15 and 35 and a nozzle 15 and 35 and the collector located below or above the nozzle blocks 13 and 33, preferably a voltage of 1 kV or more, more preferably 20 kV or more.

On the other hand, the spinning liquid to be filled in the spinning liquid main tank 31 is continuously and constantly supplied in a plurality of nozzles 35 to which a high voltage is applied through the metering pump, and the spinning solution supplied from the nozzle 35 is supplied to the nozzle On a first nanofiber web which is laminated by top-down or bottom-down electrospinning on the top surface of the substrate while being radiated and focused on a collector 37 with a high voltage applied by a second nano- A fibrous web is laminated.

At this time, the conveyance of the base material to the top-down or bottom-up electrospinning apparatus 10, the conveyance to the rotating apparatus 20 and the conveyance to the bottom-up or top-down electrospinning apparatus 30 are performed by the conveying roller 7.

The present invention includes a top-down or bottom-up electrospinning apparatus 10; It is preferable that the bottom-up or bottom-down electrospinning device 30 is arranged in a straight line toward the horizontal direction, but it is preferable that the electrospinning devices are disposed in the vertical direction in which the electrospinning devices are positioned in layers, . The fact that they can be arranged in the vertical direction for each layer or in the U direction in the same layer has the advantage that the productivity can be increased in a limited area.

That is, the rotary device is characterized in that the support rotates 180 degrees or vertically rotates in the U-turn direction by the flip device.

As described above, by repeating the process of successively laminating the nanofiber webs on one side of the substrate while the substrate is being transferred to the top-down or bottom-up electrospinning apparatus 10 and the bottom-up or bottom-down electrospinning apparatus 30, .

In this case, the top-down or bottom-up electrospinning apparatus 10; And the spinning liquid main tanks 11 and 31 of the bottom-up or top-down electrospinning device 30 are filled with the same type of polymer spinning solution.

On the other hand, when the polymer spinning solution is a polyamic acid, the filter passes through the laminating device 19, and the polyamic acid nanofiber is thermally imidized to be made of polyimide nanofiber. Imidization in the laminating apparatus 19 is carried out at 150 to 350 ° C, and the filter including the polyamic acid nanofiber is dewatered into a polyimide nanofiber filter.

In manufacturing a nanoscreen filter medium, it is preferable to bond the nanofiber web constituting the nanoscreen filter material to the substrate by an adhesive.

It is preferable that the fine dust blocking filter of the present invention be manufactured by attaching the manufactured nanoscreen filter material to a mesh (screening net). At this time, the nanofiber web of the nanofilm filter medium adheres to one side of the mesh (insect control net), thereby forming a structure in which the nanofiber web is finally positioned between the substrate and the mesh (insect control net). The mesh may be one selected from the group consisting of a polyester mesh, a bicomponent substrate, a fiberglass mesh, or a nylon mesh. , And a basis weight of 30 to 150 g / m 2.

It is preferable to use an adhesive or ultrasonic bonding in order to attach the nano-screen filter medium and the mesh (screening net) of the present invention.

On the other hand, a mesh (insect control net) is additionally attached to a substrate on which the nanofiber web is not laminated to form a four-layer structure in the form of a first mesh (insect control net), a nanofiber web, a substrate and a second mesh , The mechanical properties of the filter can be improved.

In addition, the fine dust barrier filter may further comprise another nanofiber web on the substrate on which the nanofiber web is not laminated, and may further include a mesh on the another nanofiber web. That is, the filter for blocking fine dust may be composed of five layers in the form of a first mesh (insect control net), a first nanofiber web, a substrate, a second nanofiber, and a second mesh (screening net).

In the case of the filter for blocking fine dust composed of five layers as described above, the basis weight of the first mesh (insect control net) and the second mesh (insect control net), the weights of the first nanofiber web and the second nanofiber web are adjusted Thus, the collection efficiency can be effectively improved.

Hereinafter, embodiments of the present invention will be described in more detail. However, the embodiments are only examples of the present invention, and the scope of the present invention is not limited thereto.

[Example 1]

15% by weight of polyamic acid having a weight average molecular weight of 100,000 and 90% by weight of a solvent of N-N-dimethylacetamide (DMAc) were dissolved to prepare a polymer spinning solution having a concentration of 15%. After that, the polymer spinning solution was transferred to the nozzle block, and then the distance between the nozzle block and the collector was set to 20 cm, the applied voltage was 15 kV, the spinning liquid flow rate was 0.1 mL / h, and the 100% polyester carrier (width: 59 / 60 g / m < 2 >, electrospinning at 60 DEG C, 60 DEG C, WP: POLYESTER 20denier 96E / INCH 12.93GR / YD, WT: POLYESTER 60denier 80P / INCH 31.80GR / YD, TOTAL WEIGHT: 44.73GR / YD) Nanofilm filter media were fabricated by stacking fibrous webs. Thereafter, the polyamic acid was imidized by heat treatment at 150 ° C in a laminating apparatus. Thereafter, a polyester mesh for use as a mesh is adhered to one surface of a polyimide (PI) nanofiber web of the nanoscreen filter medium using an adhesive, wherein the polyester mesh is composed of monofilaments and has a basis weight of 91 g / m < 2 > and a density of 25.5 x 25 (pits / inch), which was 25 Mesh consisting of 100% polyester. Thus, a filter for blocking fine dust was fabricated by attaching a nano screen filter medium and a polyester mesh.

[Example 2]

A filter for blocking fine dust was prepared in the same manner as in Example 1, except that the basis weight of the polyimide nanofiber web was changed to 0.2 g / m 2.

[Example 3]

The fine dust barrier filter was prepared in the same manner as in Example 1, except that the basis weight of the polyimide nanofiber web was changed to 0.3 g / m 2.

[Example 4]

A filter for blocking fine dust was prepared in the same manner as in Example 1, except that the basis weight of the polyimide nanofiber web was changed to 0.4 g / m 2.

[Example 5]

A filter for blocking fine dust was prepared in the same manner as in Example 1 except that the basis weight of the polyimide nanofiber web was changed to 0.5 g / m 2.

[Example 6]

A filter was prepared in the same manner as in Example 1, except that a polyester mesh composed of monofilaments having a basis weight of 115 g / m 2 and a density of 32 × 30 (bore / inch) and consisting of 100% polyester was used.

[Example 7]

15% by weight of polyurethane (Pellethane 2363-80AE) from DOW (USA)) and 85% by weight of a solvent of dimethylformamide (DMF) were used to prepare a polymer spinning solution having a concentration of 15% And was provided in the raw material tank. After this, the polymer spinning solution was moved to the nozzle block, and then the distance between the nozzle block and the collector was set to 20 cm, the applied voltage was 15 kV, the flow rate of the spinning solution was 0.1 mL / h, and the 100% polyester carrier wdidth: 59/60 , Electroluminescence was carried out on a polyurethane nanofiber having a basis weight of 0.1 g / m < 2 >), WP: POLYESTER 20 denier 96E / INCH 12.93GR / YD, WT: POLYESTER 60denier 80P / INCH 31.80GR / YD, TOTAL WEIGHT: 44.73GR / YD) Nanofilm filter media were fabricated by lamination type of web. Then, a polyester mesh for use as a mesh is adhered to one surface of the polyurethane nanofiber web of the nano screen media using an adhesive, wherein the polyester mesh is composed of monofilaments and has a basis weight of 91 g / m2 and a density of 25.5 x 25 (blob / inch), which was 25 Mesh consisting of 100% polyester. Thus, a filter for blocking fine dust was fabricated by attaching a nano screen filter medium and a polyester mesh.

[Example 8]

A filter was prepared in the same manner as in Example 7 except that the basis weight of the polyurethane nanofiber web was 0.2 g / m 2.

[Example 9]

A filter was prepared in the same manner as in Example 7, except that the basis weight of the nanofiber web was 0.3 g / m 2.

[Example 10]

A filter was prepared in the same manner as in Example 7, except that the basis weight of the nanofiber web was 0.4 g / m 2.

[Example 11]

A filter was prepared in the same manner as in Example 7, except that the basis weight of the nanofiber web was 0.5 g / m 2.

[Example 12]

A filter was prepared in the same manner as in Example 7, except that a polyester mesh composed of monofilaments having a basis weight of 115 g / m 2 and a density of 32 × 30 (b / inch) and consisting of 100% polyester was used.

[Example 13]

15% by weight of polyvinylidene fluoride and 85% by weight of a solvent of N-N-dimethylacetamide (DMAc) were dissolved to prepare a polymer spinning solution having a concentration of 15% and provided in a raw material tank. After that, the polymer spinning solution was transferred to the nozzle block, and then the distance between the nozzle block and the collector was set to 20 cm, the applied voltage was 15 kV, the spinning liquid flow rate was 0.1 mL / h, and the 100% polyester carrier (width: 59 / 60 g / m < 2 >, electrospinning at 60 DEG C, WP: POLYESTER 20denier 96E / INCH 12.93GR / YD, WT: POLYESTER 60denier 80P / INCH 31.80GR / YD, TOTAL WEIGHT: 44.73GR / YD) Nanofilm filter media were fabricated by lamination of fluoride nanofiber webs. Thereafter, a polyester mesh for use as a mesh is attached to one side of the polyvinylidene fluoride nanofiber web of the nano-screen filter material using an adhesive, wherein the polyester mesh is composed of monofilaments, Of 91 g / m 2, a density of 25.5 x 25 (bara / inch), and 25 Mesh consisting of 100% polyester. Thus, a filter for blocking fine dust was fabricated by attaching a nano screen filter medium and a polyester mesh.

[Example 14]

A filter was prepared in the same manner as in Example 13 except that the basis weight of the nanofiber web was 0.2 g / m 2.

[Example 15]

A filter was prepared in the same manner as in Example 13, except that the basis weight of the nanofiber web was 0.3 g / m 2.

[Example 16]

A filter was prepared in the same manner as in Example 13 except that the basis weight of the nanofiber web was 0.4 g / m 2.

[Example 17]

A filter was prepared in the same manner as in Example 13, except that the basis weight of the nanofiber web was 0.5 g / m 2.

[Example 18]

A filter was prepared in the same manner as in Example 13, except that a polyester mesh composed of monofilaments having a basis weight of 115 g / m 2 and a density of 32 × 30 (bore / inch) and consisting of 100% polyester was used.

[Example 19]

15% by weight of polyacrylonitrile and 85% by weight of a solvent of N, N-dimethylformamide (DMF) were dissolved to prepare a polymer spinning solution having a concentration of 15% and provided in a raw material tank. After that, the polymer spinning solution was transferred to the nozzle block, and then the distance between the nozzle block and the collector was set to 20 cm, the applied voltage was 15 kV, the spinning liquid flow rate was 0.1 mL / h, and the 100% polyester carrier (width: 59 / 60 g / cm < 2 >, electrospun on a polyethylene terephthalate film 60, WP: POLYESTER 20 denier 96 E / INCH 12.93 GR / YD, WT: POLYESTER 60 denier 80 P / INCH 31.80 GR / YD, Nano - screen filter media were prepared by lamination of nitrile nanofiber webs. Thereafter, a polyester mesh for use as a mesh is attached to one side of the polyacrylonitrile nanofiber web of the nanoscreen filter material using an adhesive, wherein the polyester mesh is composed of monofilaments and has a basis weight 91 g / m < 2 > and a density of 25.5 x 25 (bones / inch) and was 25 Mesh consisting of 100% polyester. Thus, a filter for blocking fine dust was fabricated by attaching a nano screen filter medium and a polyester mesh.

[Example 20]

A filter was prepared in the same manner as in Example 19, except that the basis weight of the nanofiber web was 0.2 g / m 2.

[Example 21]

A filter was prepared in the same manner as in Example 19, except that the basis weight of the nanofiber web was 0.3 g / m 2.

[Example 22]

A filter was prepared in the same manner as in Example 19, except that the basis weight of the nanofiber web was 0.4 g / m 2.

[Example 23]

A filter was prepared in the same manner as in Example 19 except that the basis weight of the nanofiber web was 0.5 g / m 2.

[Example 24]

A filter was prepared in the same manner as in Example 19, except that a polyester mesh composed of monofilaments having a basis weight of 115 g / m 2 and a density of 32 × 30 (bara / inch) and consisting of 100% polyester was used.

[Example 25]

15% by weight of nylon and 85% by weight of a formic acid solvent were dissolved to prepare a polymer spinning solution having a concentration of 15%, which was provided in the raw material tank. After that, the polymer spinning solution was transferred to the nozzle block, and then the distance between the nozzle block and the collector was set to 20 cm, the applied voltage was 15 kV, the spinning liquid flow rate was 0.1 mL / h, and the 100% polyester carrier (width: 59 / M < 2 >) of a basis weight of 0.1 g / m < 2 > to obtain a nylon nanofiber having a basis weight of 0.1 g / m < 2 & Nanofilm filter media were fabricated by lamination type of web. Thereafter, a polyester mesh for use as a mesh is adhered to one side of the polyurethane nanofiber web of the nano screen media using an adhesive. The polyester mesh is composed of monofilaments and has a basis weight of 91 g / m 2 And a density of 25.5 x 25 (b / inch), which was 25 Mesh composed of 100% polyester. Thus, a filter for blocking fine dust was fabricated by attaching a nano screen filter medium and a polyester mesh.

[Example 26]

A filter was prepared in the same manner as in Example 25 except that the basis weight of the nanofiber web was 0.2 g / m 2.

[Example 27]

A filter was prepared in the same manner as in Example 25, except that the basis weight of the nanofiber web was 0.3 g / m 2.

[Example 28]

A filter was prepared in the same manner as in Example 25 except that the basis weight of the nanofiber web was 0.4 g / m 2.

[Example 29]

A filter was prepared in the same manner as in Example 25 except that the basis weight of the nanofiber web was 0.5 g / m 2.

[Example 30]

A filter was prepared in the same manner as in Example 25 except that the polyester mesh was composed of monofilament and had a basis weight of 115 g / m 2 and a density of 32 × 30 (bore / inch) and consisting of 100% polyester and 35 M shears.

[Example 31]

15% by weight of polyethersulfone (PES) and 85% by weight of a solvent of N-N-dimethylacetamide (DMAc) were dissolved to prepare a polymer spinning solution having a concentration of 15%. After that, the polymer spinning solution was transferred to the nozzle block, and then the distance between the nozzle block and the collector was set to 20 cm, the applied voltage was 15 kV, the spinning liquid flow rate was 0.1 mL / h, and a 100% polyester carrier (width: 59/60 " , WP: POLYESTER 20denier 96E / INCH 12.93GR / YD, WT: POLYESTER 60denier 80P / INCH 31.80GR / YD, TOTAL WEIGHT: 44.73GR / YD) ) Nanofiber webs were laminated to produce nanoscreen filter media. Thereafter, a polyester mesh for use as a mesh is attached to one side of the polyethersulfone (PES) nanofiber web of the nanosynthetic filter material using an adhesive, wherein the polyester mesh is composed of monofilaments It had a basis weight of 91 g / m2 and a density of 25.5 x 25 (bara / inch), which was 25 Mesh consisting of 100% polyester. Thus, a filter for blocking fine dust was fabricated by attaching a nano screen filter medium and a polyester mesh.

[Example 32]

A filter for blocking fine dust was prepared in the same manner as in Example 31 except that the basis weight of the polyethersulfone nanofiber web was changed to 0.2 g / m 2.

[Example 33]

A filter for blocking fine dust was prepared in the same manner as in Example 31, except that the basis weight of the polyether sulfone nanofiber web was changed to 0.3 g / m 2.

[Example 34]

A filter for blocking fine dust was prepared in the same manner as in Example 31, except that the basis weight of the polyethersulfone nanofiber web was changed to 0.4 g / m 2.

[Example 35]

A filter for blocking fine dust was prepared in the same manner as in Example 31, except that the basis weight of the polyether sulfone nanofiber web was changed to 0.5 g / m 2.

[Example 36]

A filter was prepared in the same manner as in Example 31, except that a polyester mesh composed of monofilaments having a basis weight of 115 g / m 2 and a density of 32 × 30 (bore / inch) and consisting of 100% polyester was used.

[Example 37]

15% by weight of polyamic acid having a weight average molecular weight of 100,000 and 90% by weight of a solvent of N-N-dimethylacetamide (DMAc) were dissolved to prepare a polymer spinning solution having a concentration of 15%. Thereafter, the polymer spinning solution was moved to each nozzle block of the top-down electrospinning device and the bottom-up electrospinning device. The distance between the nozzle block and the collector was set to 20 cm, the applied voltage was 10 kV, the spinning solution flow rate was 0.1 mL / h, (Width: 59/60 ", WP: POLYESTER 20denier 96E / INCH 12.93GR / YD, WT: POLYESTER 60denier 80P / INCH 31.80GR / YD, TOTAL WEIGHT: 44.73GR / YD) The web was laminated. That is, on the top-down electrospinning device located at the front end, the polymer spinning solution is electrospun on the polyester carrier to form a first nanofiber web. In the bottom-up electrospinning device located at the rear end after rotating the laminate composed of the polyester carrier first nanofiber web by 180 degrees (after up-down reversing) by the rotating device, the polymer spinning solution is applied on the first nanofiber web The nanofiber web was laminated by electrospinning to form a second nanofiber web. Thereafter, the polyamic acid was imidized by heat treatment at 150 ° C in a laminating apparatus. Thereafter, a polyester mesh for use as a mesh is adhered to one surface of the second nanofibrous web using an adhesive, wherein the polyester mesh is composed of monofilaments and has a basis weight of 91 g / m 2 and a density of 25.5 X25 (bore / inch) and was 25 Mesh consisting of 100% polyester. Thus, a filter for blocking fine dust was fabricated by attaching a nano screen filter medium and a polyester mesh.

[Example 38]

Except that 15% by weight of polyurethane instead of polyamic acid was dissolved in 85% by weight of dimethylformamide (DMF) and 15% concentration was used instead of polyamic acid as the polymer spinning solution and imidization was not carried out by heat treatment Was prepared in the same manner as in Example 37 to prepare a filter for blocking fine dust particles.

[Example 39]

Except that polyvinylidene fluoride spinning solution was used as a polymer spinning solution except that 15 wt% of polyvinylidene fluoride having a weight average molecular weight of 50,000 and 85 wt% of dimethylacetamide (DMAc) were used instead of polyurethane, A filter for blocking dust particles was prepared in the same manner as in Example 38.

[Example 40]

A polyacrylonitrile spinning solution having a weight average molecular weight of 157,000 instead of polyurethane was dissolved in 15% by weight of polyacrylonitrile (Korea-Japan Synthetic Fiber) and 85% by weight of dimethylformamide (DMF) A filter for blocking fine dusts was prepared through the same procedure as in Example 38. [

[Example 41]

Except for using a nylon spinning solution having a concentration of 15% by dissolving 15% by weight of nylon having a weight average molecular weight of 50,000 and 85% by weight of formic acid instead of polyurethane as a polymer spinning solution, 38 were fabricated by the same procedure as that of Example No. 38.

[Example 42]

Except that a polyethersulfone spinning solution having a viscosity of 1,200 cps and a solid content weight of 15% polyether sulfone was dissolved in dimethylacetamide (N, N-dimethylacetamide, DMAc) at a concentration of 15% instead of polyurethane as a polymer spinning solution , And a filter for blocking fine dust was prepared through the same procedure as in Example 38.

[Comparative Example 1]

A filter composed of a nanofiber web prepared by electrospinning the same polymer spinning solution as in Example 1 was prepared between two low melting point nonwoven fabrics (LM nonwoven fabric, POA40V6) composed of two sheets and having a basis weight of 60 g / m 2.

- Dust collection efficiency

ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers) 2.5 ㎛ particle removal rate was measured by STANDARD 52.1. The test condition was a test wind speed of 1.0m / s and a terminal pressure loss of 76mmAq.

- Light transmittance

ASTM E 424-71 (2007, METHOD A 6.2.2 SELECTED ORDINATES METHOD). At this time, the wavelength range was from 390 to 1722 nm, the wavelength interval was 1 nm, and the measuring apparatus was a UV-VIS-NIR SPECTROPHOTOMETER.

- Ventilation measurement

The air permeability at 125 Pa was measured using ASTM D737-96 (Frazier).

Dust collection efficiency (%) Ventilation (CFM) Light transmittance (%) Example 1 85 195 72 Example 2 86 140 70 Example 3 88 100 69 Example 4 89 95 67 Example 5 90 75 65 Example 6 85 190 68 Example 7 88 185 67 Example 8 89 160 65 Example 9 91 122 64 Example 10 92 100 62 Example 11 94 90 60 Example 12 90 147 63 Example 13 92 180 68 Example 14 94 162 66 Example 15 95 125 65 Example 16 97 102 63 Example 17 99 88 61 Example 18 93 145 65 Example 19 84 190 70 Example 20 85 150 69 Example 21 87 112 67 Example 22 88 90 66 Example 23 89 81 64 Example 24 84 184 68 Example 25 90 182 67 Example 26 92 161 66 Example 27 93 120 65 Example 28 95 101 63 Example 29 97 91 60 Example 30 91 146 64 Example 31 82 190 69 Example 32 83 162 68 Example 33 85 125 66 Example 34 86 100 65 Example 35 88 89 63 Example 36 84 148 67 Example 37 85 150 64 Example 38 90 147 63 Example 39 93 145 65 Example 40 85 145 65 Example 41 90 146 64 Example 42 82 147 63 Comparative Example 1 30 15 0

Therefore, the embodiment of the present invention has an advantage that the efficiency as a filter is higher than that of the comparative example, the air permeability and the light transmittance are high, so fine dust and the like are effectively filtered out and ventilation is performed well. The lower the basis weight, the better the air permeability, and the higher the basis weight, the better the efficiency.

Further, in Examples 37 to 42, there is an advantage that the productivity of manufacturing the filter including the nanofiber web can be increased by using the bottom-up and top-down electrospinning device together.

As described above, the filter and the method for fabricating the fine dust filter according to the present invention are not limited to the configurations and the methods of the embodiments described above, but the embodiments may be modified in various ways, All or some of the embodiments may be selectively combined.

1: a nanofiber manufacturing apparatus, 3: a support,
5: feed roller, 7: feed roller,
9: take-up roller, 10: top-down electrospinning device,
11: tank main tank, 13: nozzle block,
14: voltage generating device, 15: nozzle,
17: collector, 20: rotating device,
20-1: Flip device,
21, 21: left and right guide members,
22, 22: Left and right guide grooves,
30: bottom-up electrospinning device, 31: spinning liquid main tank,
33: nozzle block, 35: nozzle,
37: collector, 50: laminating device,
60: Temperature control device,
70: air permeability measuring device,
112: tubular body,
113: Heat line.

Claims (21)

Mesh; And
And a nano screen media formed on one side of the mesh,
The nanoscreen filter medium comprises a substrate and a nanofiber web prepared by electrospinning a polymer spinning solution on the substrate,
Wherein the mesh and the nanofiber web of the nanoscreen filter media are adhered opposite to each other. The method according to claim 1,
Wherein the polymer spinning solution comprises polyurethane. The method according to claim 1,
Characterized in that the polymer spinning solution comprises polyvinylidene fluoride. The method according to claim 1,
Wherein the polymer spinning solution comprises nylon. The method according to claim 1,
Characterized in that the polymer spinning solution comprises polyacrylonitrile. The method according to claim 1,
Wherein the polymer spinning solution comprises polyamic acid. The method according to claim 1,
Characterized in that the polymer spinning solution comprises polyethersulfone. 8. The method according to any one of claims 1 to 7,
Wherein the substrate of the nanoscreen filter medium is a nylon carrier or a polyester carrier. 8. The method according to any one of claims 1 to 7,
Wherein the substrate and the mesh are respectively flame-proofed by coating with a flame-retardant agent. 8. The method according to any one of claims 1 to 7,
Wherein the mesh is one selected from the group consisting of a polyester mesh, a fiberglass mesh and a nylon mesh, and the basis weight is 30 to 150 g / m < 2 > Dust filter. 8. The method according to any one of claims 1 to 7,
Wherein the nanofiber web has a basis weight of 0.001 to 2 g / m < 2 >. 8. The method according to any one of claims 1 to 7,
Wherein the fine dust blocking filter has a fine dust collecting efficiency of 80% or more. 8. The method according to any one of claims 1 to 7,
Wherein the filter for blocking fine dust has an air permeability of 10 to 500 CMF and a light transmittance of 30 to 80%. 8. The method according to any one of claims 1 to 7,
The fine dust barrier filter may further include a mesh on a substrate on which the nanofiber web is not laminated,
Wherein another nanofiber web is formed on the substrate on which the nanofiber web is not laminated, and further comprises a mesh on the another nanofiber web. Preparing a substrate;
Moving the substrate to an electrospinning device, electrospinning the polymer spinning solution on the substrate, and laminating the nanofiber web to produce a nanoscreen filter material; And
And attaching a mesh on the nanofiber web constituting the nanofiltration filter material. 16. The method of claim 15,
Wherein the step of attaching the mesh to the nanofiber web comprises ultrasonic bonding or applying an adhesive. ≪ RTI ID = 0.0 > 8. < / RTI > 16. The method of claim 15,
Wherein the step of laminating the nanofiber web on a substrate includes electrospinning a polymer spinning solution after electrospinning or applying an adhesive on a substrate. 16. The method of claim 15,
Characterized in that the polymer spinning solution is electrospun through a nozzle at a high temperature of 45 to 120 DEG C by using a temperature control device in the step of laminating the nanofiber web by electrospinning the polymer spinning solution on the substrate A method of manufacturing a filter for blocking dust. 16. The method of claim 15,
The step of electrospinning the polymer spinning solution on the substrate to laminate the nanofiber web
Forming a first nanofiber web on the first surface of the substrate by electrospinning the polymer spinning solution with a top-down electrospinning device;
The laminate having the first nanofiber web laminated thereon is rotated 180 degrees with the lower surface passing through the rotating device; And
And sequentially laminating a second nanofiber web on the first nanofiber web by electrospinning the polymer spinning solution with a bottom-up electrospinning device. 16. The method of claim 15,
Further comprising the step of attaching a mesh to the substrate on which the nanofiber web is not laminated after the step of attaching the mesh. ≪ Desc / Clms Page number 19 > 16. The method of claim 15,
Depositing another nanofiber web by electrospinning another polymer spinning solution on a substrate on which the nanofiber web is not laminated after the step of attaching the mesh; And
Further comprising attaching a mesh to said another nanofiber web. ≪ RTI ID = 0.0 > 11. < / RTI >

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