KR20180037788A - Antibacterial nanofiber nonwoven and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an antibacterial nanofiber fabric which comprises: a base material; and a nanofiber non-woven fabric prepared by electrospinning a spinning solution containing a polymer and an antibacterial agent on the base material. The electrospinning is conducted by two electrospinning devices, wherein a bottom-up electrospinning device is placed on the front end while a top-down electrospinning device is placed on the rear end in order. A rotation device is provided between the electrospinning devices, and nanofiber non-woven fabric is laminated continuously on one side of the base material by rotating a laminate. As the nanofiber non-woven fabric of the present invention is electrospun by mixing silver nanoparticles along with the spinning solution, it is possible to produce the nanofiber non-woven fabric ensuring high antibacterial functions. In addition, the nanofiber fabric is highly productive by using the bottom-up electrospinning device and the top-down electrospinning device together.

Description

TECHNICAL FIELD [0001] The present invention relates to a nanofiber fabric having antibacterial function and a method for manufacturing the nanofiber fabric,

The present invention relates to a nanofiber fabric having an antibacterial function and a method for producing the same, wherein an antimicrobial agent is effectively contained on a nanofiber nonwoven fabric by injecting an antimicrobial agent into a spinning solution and electrospinning the nanofiber fabric, and a bottom-up electrospinning device and a top- As a result, a highly productive nanofiber fabric is produced.

As the importance of nanotechnology (NT) along with IT and BT has become more important in domestic and foreign countries, there is a strong interest in manufacturing of nanofibers in textile / apparel field and development of high value added materials utilizing them. High functional nanofibers are expected to grow rapidly due to growing demand in the future. Therefore, it is necessary to develop lightweight, high performance, high-tech fibers that can meet the needs and preferences of consumers. In recent years, well-being type products are in the limelight, and in order to meet such a demand of consumers, it is required to develop high performance and high-performance fiber material that can realize new functions and properties beyond the limit of castability of existing materials. The textile industry using nanotechnology is attracting attention as the core technology that will lead the 21st century, and it is necessary to research the application field that can be applied together with the material development.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a nanofiber fabric including an nanofiber nonwoven fabric produced by electrospinning and having an antibacterial function and a bedding including the nanofiber fabric. It is another object of the present invention to provide a method of manufacturing a nanofiber fabric capable of mass-producing nanofiber nonwoven fabrics by using a bottom-up and top-down electrospinning device together with an electrospinning device.

According to a preferred embodiment of the present invention, there is provided a nanofiber nonwoven fabric produced by electrospinning a base fluid and a spinning solution containing a polymer and an antimicrobial agent on the base material, wherein the electrospinning is composed of two electrospinning devices, Characterized in that a top-down type electrospinning device and a bottom-up type electrospinning device are arranged in this order and a rotating device is provided between the electrospinning devices so that the laminate is rotated to continuously laminate the nanofiber nonwoven fabric on one side of the substrate. Functionalized nanofiber fabric. Wherein the electrospinning is constituted by three or more electrospinning apparatuses, wherein the bottom-up and top-down electrospinning apparatuses are alternately arranged, and a rotating device for rotating the stacking body by 180 degrees is provided between the electrospinning apparatuses , The electrospinning is constituted by three or more electrospinning devices, the top-down type and the bottom-up type electrospinning devices are alternately arranged, and a rotating device for rotating the laminate by 180 degrees is provided between the respective electrospinning devices. Further, the basis weight of the nanofiber nonwoven fabric is 0.1 g / m 2 or more and 20.0 g / m 2 or less, and more preferably, the basis weight of the nanofiber nonwoven fabric is 0.1 g / m 2 or more and less than 1.0 g / m 2. The support is characterized by being a thermoplastic polyurethane base. The polymer is preferably one or more selected from the group consisting of polyurethane, polyvinylidene fluoride, nylon and polyethylene terephthalate, and the antimicrobial agent is preferably silver nitrate, Sulfuric acid and silver chloride, and the content thereof is 0.01 to 5% by weight.

According to another preferred embodiment of the present invention, there is provided a method for producing a nonwoven fabric, comprising the steps of preparing a base material, moving the base material to a bottom-up electrospinning device, electrospinning a first spinning solution containing a polymer and an antimicrobial agent on a lower surface of the base material, Stacking step, Rotating the base material on which the first nanofiber nonwoven fabric is laminated on the lower surface so that the lower surface is the upper surface through the rotating device, moving the base material to the top-down electrospinning device, Laminating a second nano fiber nonwoven fabric by electrospunning a second spinning solution containing an antimicrobial agent, and laminating a laminate having a first nano fiber nonwoven fabric and a second nano fiber nonwoven fabric laminated on the base material The present invention provides a method for producing a nanofiber fabric having an antibacterial function.

According to another preferred embodiment of the present invention, there is provided a method of manufacturing a nanofiber nonwoven fabric, comprising the steps of preparing a substrate, moving the substrate to a top-down electrospinning apparatus, electrospinning a first spinning solution containing a polymer and an antimicrobial agent on a top surface of the substrate, Rotating the base material on which the first nanofiber nonwoven fabric is laminated on the upper surface through the rotating device so that the upper surface is the lower surface, moving the base material to the bottom-up electrospinning device, Laminating a second nano fiber nonwoven fabric by electrospinning a second spinning solution containing a polymer and an antimicrobial agent on a nonwoven fabric, and laminating a laminate on which the first nano fiber nonwoven fabric and the second nano fiber nonwoven fabric are laminated The present invention also provides a method for producing a nanofiber fabric having an antibacterial function.

The nanofiber nonwoven fabric having an antibacterial function according to the present invention can be produced by mixing silver nanoparticles together with a spinning solution and electrospun to produce a nanofiber nonwoven fabric having a high antibacterial function.

In addition, since the nanofiber fabric of the present invention uses both the bottom-up electrospinning device and the top-down electrospinning device, productivity is high.

1 is a side view schematically showing an electrospinning apparatus for manufacturing a nanofiber nonwoven fabric according to an embodiment of the present invention.
2 is a side view schematically showing an electrospinning apparatus for producing a nanofiber nonwoven fabric according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail.

The nanofiber fabric having antibacterial function of the present invention is produced by electrospinning a polymer spinning solution containing an antimicrobial substance on a substrate.

As the substrate used in the present invention, a substrate capable of serving as a support such as paper, art paper, meltblown nonwoven fabric, spunbonded nonwoven fabric, polyethylene terephthalate based material, bicomponent base material and thermoplastic polyurethane based material is preferably used Do. Such a substrate serves as a support for maintaining the shape stability.

When the two-component substrate is used in the present invention, the fiber-forming polymer of the two-component substrate may be a polyester including polyethylene terephthalate, polyethylene naphthalate, polypropylene terephthalate, and polybutylene terephthalate, Phthalates are also polybutylene terephthalates such as polytrimethylene terephthalate and polytetramethylene terephthalate. When a two-component substrate is used, polyethylene terephthalate in which two components having different melting points are bonded is most preferable. The polyethylene terephthalate two-component substrate may be classified into a sheath-core type, a side-by-side type, a C-type, and the like. In the case of the sheath-core type two-component substrate, the sheath portion is a low melting point polyethylene terephthalate, and the core portion is made of general polyethylene terephthalate. Wherein the sheath portion is about 10 to 90 wt%, and the core is about 90 to 10 wt%. The sheath portion acts as a thermal binder to form the outer surface of the binder fiber, has a melting point of about 80 to 150 占 폚, and the core has a melting point of about 160 to 250 占 폚. The CIS type heterogeneous base material used as an embodiment in the present invention includes an amorphous polyester copolymer in which a melting point is not exhibited by a conventional melting point analyzer in the sheath portion and preferably a relatively high melting point component Is a thermally adhesive composite fiber to be used.

The polyester copolymer contained in the sheath portion is a copolyester in which 50 to 70 mol% is a polyethylene terephthalate unit. As the copolymerizable acid component, isophthalic acid is preferably used in an amount of 30 to 50 mol%, but any other conventional dicarboxylic acid may be used.

As a high melting point component used as a core component, a polymer having a melting point of 160 ° C or higher is suitable. Examples of the high melting point component include polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene terephthalate copolymer and polypropylene.

Further, in the present invention, it is preferable to use a thermoplastic polyurethane (TPU) as a support. The TPU substrate is preferably produced in a meltblown manner.

First, the polyurethane is a polymer of a urethane bond formed by the reaction of a polyisocyanate and a polyalcohol. Polyurethane is excellent in elasticity, abrasion resistance, and processability, and is widely used in industrial, consumer products, and parts. Since the properties of polyurethane vary depending on the type of polyurethane, selection of a product suitable for the application is important.

The polyurethane is classified into two types, thermoplastic polyurethane and thermosetting polyurethane. The thermoplastic polyurethane has excellent characteristics such as strength, formability, chemical resistance, oil resistance and wear resistance. BACKGROUND ART [0002] Flexible nonwoven fabrics made of thermoplastic polyurethane (hereinafter referred to as "TPU") have been used for applications including clothing, sanitary materials, and sporting goods materials due to their high elasticity, low residual strain and excellent air permeability. The thermoplastic polyurethane nonwoven fabric produced by the so-called melt-blow spinning method has excellent stretchability, flexibility and air permeability, and has been conventionally used as a side band of paper diapers, a base fabric of first-aid bandages, And the like, which are relatively soft and stretchable, such as sports apparel, stretch cotton pads, and the like.

The process for producing the thermoplastic polyurethane is well known. That is, it is prepared by reacting a linear polyol containing a hydroxy end group such as a polyester polyol or a polyether polyol with a diisocyanate compound containing an isocyanate group at both terminals, and optionally, a chain extender, a monoamine compound Terminal stopping agents, and other additives.

Examples of the polyol include various diols comprising a linear homo or copolymer such as a polyester diol, a polyether diol, a polyester amide diol, a polyacryl diol, a polythioester diol, a polythioether diol, a polycarbonate diol, ≪ / RTI > may be used. More specific examples include polyalkylene ether glycols such as polyoxyethylene glycol, polyoxypropylene glycol, polytetramethylene ether glycol, copolymer polyether glycol composed of tetramethylene group and 3-methyl tetra ketylene group.

As the diisocyanate compound serving as a hard segment, an aromatic, aliphatic or alicyclic diisocyanate is used, for example, 4,4'-diphenyl ketadiisocyanate, 1,3- and 1,4-cyclohexylene diisocyanate, 1,6-hexamethylene diisocyanate, trimethylene diisocyanate, tetramethylene diisocyanate, isophorone diisocyanate, and the like, but are not limited thereto.

Examples of the chain extender include a diamine compound or a diol compound. Examples of the chain extender include a diamine compound such as methylene diamine, ethanol diamine, 1,2-propylene diamine and the like, and a diamine compound such as ethylene glycol, 1,3-propanediol, , Neopentyl glycol, and the like, but are not limited thereto.

Examples of the terminal terminating agent include monoamine compounds such as monoethanolamine, diethanolamine and diisopropylamine.

On the other hand, the number average molecular weight of the thermoplastic polyurethane is preferably 1,000 to 100,000.

In the present invention, such a thermoplastic polyurethane is used as a base material. The nonwoven fabric is produced by preparing a web (a state in which fibers are repeatedly laminated) and entangling the fibers physically and chemically together.

Typical nonwoven fabrication processes involve web formation and web bonding processes. The general process is used only for single-fiber nonwovens, and this process is not necessary because longwoven nonwovens use filaments by spinning. In the case of non-woven fabric, it is put in a compressed bale state, so that the nonwoven fabric must undergo the process of compressed fibers. The formation process of the web is a necessary process for forming the nonwoven fabric. The dry nonwoven fabric forms the web in the air, whereas the wet nonwoven fabric disperses the fibers to obtain the web. Therefore, in the dry nonwoven fabric, the arrangement of the fibers is mostly directional, but the wet nonwoven fabric has a random irregular arrangement of the fibers. However, the development of a random card machine for dry nonwovens also makes it possible to obtain a web having no directionality depending on its application.

As a method of forming the web, a spun bond method using long fibers produced by dissolving radiation from raw pellets, a dry method of forming a web by arranging short fibers in a predetermined direction in a card machine or the like, And a wet method in which the water is homogeneously dispersed and drained to form a web.

Methods for entangling the fibers include a thermal bond method in which a thermally soluble fiber is mixed with a web and a thermal roll is used, a chemical bond method in which a binder is bonded (adhered fat), a barb of a needle A meltblown method capable of forming webs randomly by impacting filaments with high-pressure air at the time of producing fibers, and capable of producing a web having a diameter of 0.5 to 30 microns, etc. .

Among them, the thermoplastic polyurethane base used in the present invention is preferably produced by the meltblown method, the spunbond method and the needle punch method among the above methods. The principle of the meltblown method is a melt spinning method using a thermoplastic resin, in which a high-temperature and high-pressure airflow is introduced into the outlet of the spinning nozzle to stretch and open the fibers, and then the fibers are accumulated on a collecting conveyor. The nonwoven fabric by this method has an advantage of being excellent in flexibility, impermeability and insulation. Generally, a thermoplastic polyurethane nonwoven fabric is produced by a meltblown spinning method. A general method of meltblown spinning will be described below. That is, the molten thermoplastic polymer is fed to nozzle holes arranged in a row, the molten polymer is continuously extruded from the nozzle holes, the hot gas is jetted at high speed from the slits arranged on both sides of the nozzle hole group, The polymer extruded from the nozzle holes is thinned and cooled to form continuous filaments and then the continuous filament group is accumulated on a moving conveyor net or the like to adhere the filaments to each other by the self-adhesiveness of the filaments themselves.

On the other hand, the spunbond method is a method in which a raw material is spun and self-bonded by heat to form a nonwoven fabric. It is a technology for forming a web by spun polypropylene or polyethylene terephthalate mainly by self-adherence by heat, and there is an advantage that the fabric design is easy.

In addition, in the case of the needle punching method, fibers are physically manufactured by combining webs using special needles, and it is possible to diversify the thickness of the product by the number of punching of needles and the density of needles.

The thermoplastic polyurethane nonwoven fabric produced by such a nonwoven fabric manufacturing method is preferably used as the base material used in the present invention. The thermoplastic polyurethane nonwoven fabric substrate has a structure in which the pores are small and uniformly dispersed and distributed in spite of the fact that the surface area is very low, very thin, soft and soft, and has air permeability as well as excellent elongation and expansion characteristics. It is also possible to attach a thinner, soft and soft composite material when combined with other members in that it can be composed of a thin nonwoven fabric. The thermoplastic polyurethane has a melting point of 80 to 200 ° C. Therefore, there is an advantage that the thermal adhesiveness is good and can be used for thermal bonding after the heat treatment. On the other hand, the basis weight of the base material is preferably 10 to 150 g / m < 2 >. If the basis weight is less than 10 g / m < 2 >, the physical properties of the base material are deteriorated. If the basis weight exceeds 150 g / m & .

The thermoplastic polyurethane nonwoven fabric can be hydrophobic or hydrophilic, can be introduced in color, and can be partially melted in a high-temperature laminating environment due to its thermoplastic characteristics, so that the thermoplastic polyurethane non- There is a possible advantage.

The basis weight of the base material is preferably 10 to 150 g / m < 2 >. If the basis weight is less than 10 g / m < 2 >, the physical properties of the base material are poor. If the basis weight is more than 150 g / m2, stiffness is high.

Meanwhile, the nanofiber nonwoven fabric used in the present invention is characterized by being formed by electrospinning. Hereinafter, a nanofiber nonwoven fabric manufactured using an electrospinning device will be described.

The electrospinning apparatus of the present invention comprises a spinning liquid main tank for storing a spinning solution, a metering pump for supplying a spinning solution in a fixed amount, and a multiple tubular nozzle composed of a plurality of pins are combined in a block form, A collector for accumulating short fibers emitted at a position corresponding to the nozzle block, a voltage generating device for generating a high voltage, and a spinning solution discharging device connected to the top of the nozzle block.

* First, prepare a spinning solution in which the polymer is dissolved in a solvent, store the polymer spinning solution in the spinning solution main tank, weigh it with a separate metering pump, and feed it into the spinning solution dropping device in a fixed amount.

In this way, the spinning solution supplied into the spinning solution dropping device is supplied to the spinning solution supply plate of the nozzle block in which a high voltage is applied discretely while passing through the spinning solution dropping device and the stirrer is installed. The spinning liquid drop device also blocks the flow of spinning liquid and prevents electricity from flowing into the spinning liquid main tank.

Subsequently, in the nozzle block, the spinning liquid is discharged through a nozzle to a collector at an upper portion where a high voltage is applied to produce nanofibers. The spinning liquid transferred to the spinning liquid supply pipe is discharged to the collector through the nozzle to form fibers. At this time, the nanofibers electrified from the nozzles spread over the air sprayed from the nozzles for air supply, and are collected on the collector, thereby widening the collecting area and making the density of the particles uniform. The overspray fluid which is not fibrous in the nozzle is collected in the overflow removing nozzle and travels to the circulating fluid supply plate through the temporary storage plate of the overflow liquid.

The thickness of the nanofiber nonwoven fabric, the diameter of the fiber, the shape of the fiber, and the mechanical characteristics of the separation membrane are arbitrarily changed by changing the electrospinning process conditions such as the intensity of the applied voltage, the kind of the polymer solution, the viscosity of the polymer solution, Can be adjusted.

At this time, in order to promote the formation of the fiber by the electric force, a voltage of 1 kV or more, more preferably 20 kV or more, generated by the voltage generator is applied to the conductive plate and collector provided at the lower end of the nozzle block. It is more advantageous in terms of productivity to use an endless belt as the collector. The collector preferably reciprocates a predetermined distance in the left and right directions to uniform the density of the nanofibers.

When the nanofibers formed on the collector are wound on a winding roller through a web supporting roller, the nanofiber manufacturing process is completed. The polymer is not particularly limited, and examples thereof include polypropylene (PP), polyethylene terephthalate (PET), polyvinylidene fluoride, nylon, polyvinyl acetate, polymethylmethacrylate, polyacrylonitrile (PAN) , Polyurethane (PUR), polybutylene terephthalate (PBT), polyvinyl butyral, polyvinyl chloride, polyethyleneimine, polyolefin, polylactic acid (PLA), polyvinyl acetate (PVAc), polyethylene naphthalate There are polyamide (PA), polyvinyl alcohol (PVA), polyethylene imide (PEI), polycaprolactone (PCL), polylactic acid glyceric acid (PLGA), silk, cellulose, chitosan, ) Materials and heat-resistant polymeric materials such as polyamide, polyimide, polyamideimide, poly (meta-phenylene isophthalamide), polysulfone, polyetherketone, polyetherimide, Aromatic polyesters such as terephthalate, polytrimethylene terephthalate, and polyethylene naphthalate; polyesters such as polytetrafluoroethylene, polydiphenoxaphospazene, and polybis [2- (2-methoxyethoxy) Polyurethane copolymers including polyphosphazene, polyphosphazene, phosphazene, polyurethane and polyether urethane, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, and the like are preferably used.

More preferably, one or more selected from the group consisting of polyurethane, polyvinylidene fluoride, nylon or polyethylene terephthalate is preferable.

The basis weight of the nanofiber nonwoven fabric produced by the present invention is preferably from 0.1 g / m 2 to 20.0 g / m 2, more preferably from 0.1 g / m 2 to less than 1.0 g / m 2. Herein, when the basis weight of the total nano fiber nonwoven fabric is less than 0.1 g / m 2 or more than 1.0 g / m 2, there is a disadvantage that the mechanical properties and antibacterial effect are not large.

On the other hand, polyurethanes preferably used as polymers are collectively referred to as urethane bonds-bonded polymer compounds formed by the combination of an alcohol group and an isocyanic acid group. Typically, there are spandex made of synthetic fibers, and urethane-based synthetic rubber is widely used. In other words, the polyurethane is collectively referred to as a polymer compound having a urethane bond (-NHCOO-) group during the repeating of the main chain. Such a polyurethane exhibits properties intermediate between polyamide and polyester, and hygroscopicity is smaller than that of polyamide and exhibits 1 to 1.5% at relative humidity of 65%. It has the advantages of abrasion resistance, chemical resistance, solvent resistance, aging resistance and oxygen stability.

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

Reaction 1. Manufacture of PVDF

PVDF is prepared by the same process as in the above reaction formula 1, and has a melting point (177) and a density (1.78) lower than those of other fluororesin, and is cheap in chemical cost and low in unit cost. It is also used as an advanced paint for exterior walls.

In addition, PVDF is a representative organic material exhibiting piezoelectricity, and many studies have been conducted since the 1960s. In PVDF polymer, four kinds of crystals are mixed, and it can be divided into at least four types of α, β, γ and δ type depending on crystal form. Among them, β-type crystals of PVDF are filled with trans-type molecular chains in parallel, and all of the permanent dipoles of the monomers are aligned in one direction and exhibit large spontaneous polarization. This means that PVDF molecules are arranged regularly through stretching to impart piezoelectricity by giving anisotropy to the aggregated state. In order to improve such piezoelectric properties, various methods for increasing the? -Form crystal in the PVDF fiber have been studied.

In the present invention, it is possible to use polyvinylidene fluoride having a different melting point. That is, it is characterized in that a low-melting point polyvinylidene fluoride having a melting point of 100 to 120 ° C and a high-melting point polyvinylidene fluoride having a melting point of 150 to 170 ° C are used together. It is also possible to mix the low-melting point and high-melting point polyvinylidene fluoride together as a polymer spinning solution, or to emit low-melting polyvinylidene fluoride and high-melting polyvinylidene fluoride, respectively, in each electrospinning apparatus .

When the low melting point polyvinylidene fluoride and the high melting point polyvinylidene fluoride are mixed together and used as one spinning liquid as described above, the spinnable low melting point polyvinylidene fluoride acts as an adhesive in the laminating process later, And the separation between the nanofiber nonwoven fabric does not easily occur. On the other hand, low melting point polyvinylidene fluoride is used as a polymer used in the electrospinning device positioned at the front end using two electrospinning devices, and high melting point polyvinylidene fluoride is used as a polymer used in the electrospinning device positioned at the rear end And a high melting point polyvinylidene fluoride nanofiber nonwoven fabric is laminated on the low melting point polyvinylidene fluoride nanofiber nonwoven fabric and a low melting point polyvinylidene fluoride nanofiber nonwoven fabric on the substrate. Also in the structure of this laminate, the low melting point polyvinylidene fluoride nanofiber nonwoven fabric can serve as an adhesive layer later in the laminating step.

In the present invention, nylon may be used as a preferred polymer. Nylon is a kind of polyamide. A polyamide is a polymer made of a polymer to which a monomer is linked by an amide bond (-CONH-), and the general name is nylon. The general structure of nylon is as follows.

At present, there are nylon 6 and nylon 66 which are widely used. Nylon 6 is manufactured by industrialization in many countries other than the United States. First, caprolactam is synthesized and ring-opened polymerization is carried out. Caprolactam, which consists of six carbons, is called nylon 6 because it is a polymer. Meanwhile, Nylon 66 is mainly manufactured by DuPont, and its production method is a synthesis method using benzene as a starting material. Both nylon 6 and nylon 66 have the chemical formula of C10H20 (CO2) (NH) 2, but their strength and specific gravity are good.

Polyethylene terephthalate (PET), which can be used as a polymer in the present invention, is a saturated polyester obtained by condensing terephthalic acid with ethylene glycol, and is excellent in heat resistance, rigidity, electrical properties, oil resistance and the like. It is often called PET. To obtain PET, bis (β-hydroxyethyl) terephthalate is obtained by ester exchange reaction by heating dimethyl terephthalate and ethylene glycol at 150 to 230 ° C. When bis (? -Hydroxyethyl) terephthalate is heated to 270 to 300 占 폚 at 1 torr or lower, polycondensation is carried out, and ethylene glycol is emitted to obtain PET. Another method of obtaining Bis (beta -hydroxyethyl) terephthalate is to react at about 230 [deg.] C while applying pressure to high purity terephthalic acid and ethylene glycol.

Meanwhile, the present invention is characterized in that an antimicrobial agent is included in a spinning solution together with a polymer. Silver nanomaterials are used as an antimicrobial agent, and a silver salt containing the silver nanomaterial is mixed with a polymer to prepare a spinning solution. Preferably, the silver metal salt includes silver nitrate, silver sulfate, silver chloride, and the like, and the content of the available antimicrobial agent is 0.01 to 5 wt% based on the whole polymer solution. When the content is less than 0.01 wt%, the antibacterial property is poor. When the content is more than 5 wt%, the radioactivity is poor.

On the other hand, the spinning solution is prepared by dissolving a polymer in a solvent, The type of solvent is not limited as long as it can dissolve the polymer, and examples thereof include phenol, formic acid, sulfuric acid, m-cresol, thifluoroacetone hydride / dichloromethane, water, N-methylmorpholine N Methyl isobutyl ketone, methyl ethyl ketone, aliphatic hydroxyl group, m-butyl alcohol, isobutyl alcohol, isopropyl alcohol, methyl alcohol, ethanol, aliphatic compounds such as hexane, tetra Propylene glycol, diethylene glycol, ethylene glycol as the glycol group, trichlorethylene, dichloromethane as the halogen compound group, toluene as the aromatic compound group, xylene, cyclohexanone as the aliphatic cyclic compound group, cyclohexanone, Hexane and ester groups, n-butyl acetate, ethyl acetate, butyl cellosolve as aliphatic ether group, 2-ethoxyethanol acetate, 2- Ethanol, dimethyl amide, dimethyl formamide, dimethylacetamide, or the like, or a mixture of plural kinds of solvents may be used. The spinning solution may contain an additive such as a conductivity improver.

The electrospinning device used in the present invention will be described in detail below.

The electrospinning apparatus used in the present invention comprises a top-down electrospinning apparatus and a bottom-up electrospinning apparatus. It is preferable that the top-down type electrospinning device and the bottom-up type electrospinning device are arranged at a predetermined interval, the top-down type electrospinning device is positioned at the front end, and the bottom-up type electrospinning device is positioned at the rear end.

It is also preferable that the electrospinning apparatus used in the present invention is constituted by three or more electrospinning apparatuses, the bottom-up electrospinning apparatus and the top-down electrospinning apparatus are arranged alternately, and a rotating apparatus is provided between each electrospinning apparatus desirable.

When the three or more electrospinning apparatuses are arranged alternately, the bottom-up electrospinning apparatus can be placed alternately with the bottom-up electrospinning apparatus placed in the front end first, but it is also possible to arrange the bottom-down electrospinning apparatus first and then alternately.

A nozzle block for discharging the spinning solution and having a plurality of nozzles arranged in a pin shape, and a nozzle block for discharging the spinning solution, And a voltage generating device for generating a voltage to a collector and a collector which are spaced apart from the nozzle by a predetermined distance in order to accumulate the polymer spinning solution. Here, as the support on which the polymer spinning solution is laminated in the bottom-up electrospinning device and the bottom-up electrospinning device, it is preferable to use a substrate usable as the support described above.

Here, each of the voltage generating devices has the same structure as a general electrospinning device, and generates a high voltage in the collector through the nozzle. In order to promote the generation of nanofibers by the electric force, It is preferable to apply a voltage of 1 kV or more, more preferably a voltage of 20 kV or more. If the voltage intensity of the voltage generating device is different, it is possible to make the diameter of the nanofiber nonwoven fabric different. That is, the diameter of the nanofiber nonwoven fabric may be varied by increasing the diameter of the nonwoven fabric.

In the meantime, a rotating device is provided between the bottom-up electrospinning device and the bottom-up electrospinning device in the present invention. The rotating device is positioned between the electrospinning devices and rotates the support by 180 degrees, And the lower surface serves to rotate the upper surface.

In the electrospinning device used in the present invention with the above structure, the polymer spinning solution filled in the spinning liquid main tank of the top-down or bottom-up electrospinning device is sprayed onto the support on the collector through the nozzle, And the nanofiber nonwoven fabric is laminated on the support, the lower surface of the support on which the first nanofibers are laminated by the rotating device is rotated 180 degrees to the upper surface . The polymer loaded in the spinning liquid main tank of the top-down electrospinning device is then transferred to a support on which the first nanofiber nonwoven fabric transferred onto the collector of the bottom-up or bottom-down electrospinning device is transferred, The spinning solution is electrospun through the nozzle and the second nanofiber nonwoven fabric is laminated on the first nanofiber nonwoven fabric.

Thereafter, a post-process is performed by a laminating apparatus for laminating a substrate and a nanofiber nonwoven fabric manufactured through the bottom-up and top-down electrospinning apparatus.

In the present invention, by providing a rotating device between the bottom-up and top-down electrospinning devices, the arrangement of the electrospinning devices can be arranged in parallel to the horizontal direction, or the respective electrospinning devices can be arranged in the vertical direction It is possible to arrange each electrospinning device in the U direction by using a bottom-up electrospinning device. By using a bottom-up electrospinning device, productivity is improved by using a bottom-down electrospinning device. By using a rotating device, It is possible to laminate the non-woven fabric of nanofibers.

Hereinafter, a method of manufacturing a nanofiber fabric according to an embodiment of the present invention will be described.

A step of preparing a base material, a step of moving the base material to a top-down type electrospinning device, a step of laminating a first nanofiber nonwoven fabric by electrospinning a first spinning solution containing a polymer and an antimicrobial agent on an upper surface of the base material, Rotating the base material on which the one nanofiber nonwoven fabric is laminated so that the upper surface is the lower surface through the rotating device; moving the base material to the bottom-up electrospinning device to remove the polymer and the antimicrobial agent on the first nanofiber non- Laminating the second nanofiber nonwoven fabric by electrospinning the second spinning liquid, and laminating a laminate having the first nanofiber nonwoven fabric and the second nanofiber nonwoven fabric laminated on the base material. The method comprising the steps of: The polymer is preferably one or more selected from the group consisting of polyurethane, polyvinylidene fluoride, nylon and polyethylene terephthalate. In addition, the present invention is characterized in that antimicrobial agents are mixed together in a spinning solution. Silver nanoparticles may be used as the antimicrobial agent. Specific examples of silver antimicrobial agents include silver nitrate, silver sulfate, silver chloride and the like, and the content thereof is preferably 0.01 to 5 wt% %.

The nanofiber fabric thus fabricated can be produced by mixing silver nanoparticles together with a spinning solution and electrospun, thereby producing a nanofiber nonwoven fabric having a high antimicrobial function. The nanofiber fabric is composed of a bottom-up electrospinning device and a top-down electrospinning device It is used together, so it has high productivity. The nonwoven fabric thus produced may be used by being laminated on a layer used as the base material, such as cellulose, cloth, cloth, knit, nonwoven fabric, scrim fabric or the like. In other words, the nano fiber nonwoven fabric of the present invention can be applied to bedding by attaching to a bedding fabric such as a pillow or a bed sheet. By applying the nanofiber nonwoven fabric, it has an advantage that it can exhibit antibacterial properties and can maintain high air permeability. In the case of cellulose, cloth, cloth, knitted fabric, nonwoven fabric, scrim fabric, etc., which can be laminated, it is preferable that the basis weight is 100 to 400 g / m 2.

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]

9.9 wt% of polyurethane (Pellethane 2363-80AE) from DOW (USA)) and 0.1 wt% of silver nitrate were dissolved in 90 wt% of NN-dimethylacetamide (DMAc) solvent to prepare a spinning solution having a concentration of 10% And was provided in the raw material tank. After that, the 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 20 cm, the applied voltage was 15 kV, the spinning solution flow rate was 0.1 mL / To a thermoplastic polyurethane base (TPU base material (Bluecher Co., IOH10UM4)) to obtain a nanofiber nonwoven fabric. That is, on the top-down electrospinning device located at the front end, the spinning solution is electrospun on the thermoplastic polyurethane base material to form a first nanofiber nonwoven fabric laminate. Then, in the bottom-up electrospinning device located at the rear end after rotating the laminate composed of the base material and the first nanofiber nonwoven fabric by 180 degrees (after upside down), the spinning solution is electrospun on the first nanofiber nonwoven fabric The second nanofiber nonwoven fabric was laminated to produce a nanofiber fabric. The total weight of the first and second nanofiber nonwoven fabrics was 0.5 g / m 2. The TPU substrate and the first and second nanofiber nonwoven fabrics are then laminated to produce a nanofiber fabric.

[Example 2]

The procedure of Example 1 was repeated except that nylon 6,6 was used as the polymer.

[Example 3]

12% by weight of polyvinylidene fluoride and 3% by weight of silver nitrate were dissolved in 85% by weight of a solvent of N-N-dimethylacetamide (DMAc) to prepare a spinning solution having a concentration of 15%. After that, the spinning solution was moved to each nozzle block of the bottom-up electrospinning device and the top-down electrospinning device. The distance between the nozzle block and the collector was 20 cm, the applied voltage was 15 kV, the spinning solution flow rate was 0.1 mL / h, To a thermoplastic polyurethane base (TPU base material (Bluecher Co., IOH10UM4)) to obtain a nanofiber nonwoven fabric. That is, on the bottom-up electrospinning device located at the front end, the spinning solution is electrospun on the thermoplastic polyurethane substrate to form a first nanofiber nonwoven fabric laminated. Then, in the top-down electrospinning device located at the middle portion after rotating the laminate composed of the base material and the first nanofiber nonwoven fabric by a rotation device by 180 degrees (after upside down), the spinning solution is electrospun on the first nanofiber nonwoven fabric A second nanofiber nonwoven fabric is laminated. Further, the laminate composed of the base material and the first and second nanofiber nonwoven fabric was again rotated 180 degrees (after the upper and lower reversal) by the rotating device, and then the spinning solution was applied to the second nanofiber nonwoven fabric And the third nanofiber nonwoven fabric is laminated to produce a nanofiber fabric. The total basis weight of the manufactured first, second and third nanofiber nonwoven fabrics was 0.8 g / m 2. Then, the TPU base material and the first, second and third nanofiber nonwoven fabrics are laminated to produce a nanofiber fabric.

* [Comparative Example 1]

10% by weight of polyurethane (Pellethane 2363-80AE) from DOW (USA)) was dissolved in 90% by weight of NN-dimethylacetamide (DMAc) to prepare a spinning solution having a concentration of 10% Respectively. Thereafter, the spinning solution was moved to the nozzle block, and the distance between the nozzle block and the collector was set to 20 cm, the applied voltage was 15 kV, the spinning solution flow rate was 0.1 mL / h, Lt; / RTI >

Then, the nanofiber nonwoven fabric and the polyethylene terephthalate base material were laminated together to produce a nanofiber nonwoven fabric. Then, the substrate and the nanofiber nonwoven fabric are laminated to produce a nanofiber fabric.

 - Production comparison

The spinning speed of the nonwoven fabrics produced by the examples and the comparative examples was 0.5 g / m ² .

- Comparison of separation between nanofiber fabric and fabric

A cloth was placed on one side of the substrates of the examples and comparative examples, and after laminating the cloth, it was washed five times, and then it was measured whether or not it was desorbed.

- Antimicrobial activity evaluation

The antimicrobial activity against staphylococci was evaluated by the AATCC 100 test method.

Example 1 Example 2 Example 3 Comparative Example 1 Winding speed (m / min) 25 25 33 10 Tally X X X O Antimicrobial activity 99.9% 99.9% 99.9% 0%

Therefore, the embodiment of the present invention can improve the productivity of the nanofiber nonwoven fabric production by using the bottom-up and top-down electrospinning device together, and it is possible to improve the adhesion between the prepared nanofiber nonwoven fabric and the TPU base material, It is possible to provide an effect of improving the quality. In addition, since the nanofiber nonwoven fabric is provided with an antimicrobial function, the antibacterial property is increased.

As described above, the nanofiber fabric according to the present invention and the fabrication method thereof can be applied to the configurations and the methods of the embodiments described above in a limited manner, All or a part of the above-described elements may be selectively combined.

1: electrospinning device
10: Bottom Electrospinning Device
20: Rotating device
30: Top-down electrospinning device
40: laminating device

Claims (11)

materials; And
And a nanofiber nonwoven fabric prepared by electrospinning a spinning solution containing a polymer and an antimicrobial agent on the base material,
Wherein the electrospinning is constituted by two electrospinning devices, a top-down type electrospinning device is disposed in the front end in a sequential manner and a bottom-up type electrospinning device is arranged in the rear end in that order, and a rotating device is provided between the electrospinning devices, Characterized in that a nanofiber nonwoven fabric is continuously laminated on the surface of the nanofiber fabric.
The method according to claim 1,
Characterized in that the electrospinning is constituted by three or more electrospinning apparatuses, wherein a bottom-up and top-down electrospinning apparatus are alternately arranged, and a rotating device for rotating the laminate body by 180 degrees is provided between the respective electrospinning apparatuses Functional nanofiber fabric.
The method according to claim 1,
Characterized in that the electrospinning is constituted by three or more electrospinning apparatuses, wherein a top-down and bottom-up electrospinning apparatus are alternately arranged, and a rotating device for rotating the laminate body by 180 degrees is provided between the respective electrospinning apparatuses Functional nanofiber fabric.
The method according to claim 1,
Wherein the basis weight of the nanofiber nonwoven fabric is 0.1 g / m 2 or more and 20.0 g / m 2 or less.
The method according to claim 1,
Wherein the basis weight of the nanofiber nonwoven fabric is 0.1 g / m < 2 > to less than 1.0 g / m < 2 >.
The method according to claim 1,
Wherein the support is a thermoplastic polyurethane base.
The method according to claim 1,
Wherein the polymer is one or more selected from the group consisting of polyurethane, polyvinylidene fluoride, nylon, and polyethylene terephthalate.
The method according to claim 1,
Wherein the nanofiber nonwoven fabric has an antimicrobial function, characterized in that a bottom-up electrospinning method is used for the front end and a top-down electrospinning method is used for the rear end.
The method according to claim 1,
Wherein the antibacterial agent is at least one selected from the group consisting of silver nitrate, silver sulfate and silver chloride, and the content thereof is 0.01 to 5% by weight.
Preparing a substrate;
Moving the base material to a bottom-up electrospinning device, electrospinning a first spinning solution containing a polymer and an antimicrobial agent on a lower surface of the base material, thereby laminating the first nanofiber nonwoven fabric;
Rotating the substrate having the first nanofiber nonwoven fabric laminated on the lower surface thereof so that the lower surface is the upper surface through the rotating device;
Moving the base material to a top-down electrospinning device, electrospinning a second spinning solution containing a polymer and an antimicrobial agent on the first nanofiber nonwoven fabric to laminate the second nanofiber nonwoven fabric; And
And laminating a laminate having the first nanofiber nonwoven fabric and the second nanofiber nonwoven fabric laminated on the base material.
Preparing a substrate;
Transferring the base material to a top-down electrospinning apparatus, electrospinning a first spinning solution containing a polymer and an antimicrobial agent on an upper surface of the base material, thereby laminating the first nanofiber nonwoven fabric;
Rotating the base material on which the first nanofiber nonwoven fabric is laminated on the upper surface through the rotating device so that the upper surface is the lower surface;
Moving the base material to a bottom-up electrospinning device, electrospinning a second spinning solution containing a polymer and an antimicrobial agent on the first nanofiber nonwoven fabric, and laminating the second nanofiber nonwoven fabric; And
And laminating a laminate having the first nanofiber nonwoven fabric and the second nanofiber nonwoven fabric laminated on the base material.

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