KR20210149529A - A mask for anti-bacteria - Google Patents

Abstract

A mask according to the present invention has antimicrobial properties against different bacterial pathogens as well as exhibits particulate matter capturing capacity, by having a non-woven fabric layer in which the surface of the fiber is plated with metal between the outer layer and the inner layer. More specifically, the mask of the present invention, which has a multi-layer structure, effectively filters particulate matter such as allergens, pollen, smoke, yellow dust, and also has high sterilization power against various bacteria, fungi, viruses, and the like, so it can be suitably used for the environments exposed to a large amount of bacteria, in particular, for medical personnel who work in hospitals.

Description

Antibacterial mask {A mask for anti-bacteria}

The present invention relates to an antibacterial mask, and more particularly, to an antibacterial mask capable of suppressing inhalation of viruses, bacteria, fungi, etc. it's about

In general, a mask is an object that covers a respiratory system, such as a nose and a mouth, in order to prevent fine dust in the air from being inhaled through the nose and scattering from the mouth. Unlike gas masks or dust masks, most of the masks are equipped with a simple structure filter on a sheet of fiber material so that they can be easily carried.

As industrialization accelerates, the continuous increase of environmental pollutants and fine dust caused by yellow dust are on the rise, and as the threat posed by the emergence of new viruses increases, a higher level of hygiene mask is required.

In such a mask, a non-woven sheet is used as a mask for removing fine dust. The mask is required to capture fine dust with high efficiency and to have low intake resistance when gas passes through so that the wearer does not feel suffocation.

Conventional face masks prevent cold air from directly inhaling through the nasal passages or oral cavity, so they can prevent a cold to some extent. A conventional face mask having

Here, most masks are manufactured using cotton yarn for reasons of wearing comfort or irritation to the skin. Wearing it may not be good for your health.

Looking at the existing technologies to solve this disadvantage, Patent Publication No. 10-2004-0106959 (copper fiber sterilization mask) uses copper microfibers made of oxygen-free copper wire thinned to 30 μm in diameter through a drawing machine, between the inner and outer skin of the mask. It is composed by inserting a verb knitting fabric made by weaving at least one or several strands of ultrafine verbs in a vertical and horizontal grid form together with anionic fibers.

However, in this case, discoloration occurs due to oxidation of copper, and the antibacterial properties of copper with an oxidized surface are greatly reduced. Therefore, in order to exhibit sufficient antibacterial activity, a large amount of copper wire must be used, and as a result, the weight becomes heavy. This is because, although generally depending on the environment, the antibacterial activity of copper is about 1/20 to 1/50 that of silver.

In addition, registered patent 10-0717884 (antibacterial mask) absorbs the antibacterial substances extracted from olive, cinnamon, ginger, pine, Shigella, spearmint, persimmon oil, mugwort, Serbia, and herbs into sepiolite, and the sepiolite is placed between cotton fibers. Although an antibacterial mask made by attaching it is proposed, in this case, antibacterial properties are insufficient, and there are problems such as a decrease in antibacterial durability due to washing.

Republic of Korea Patent Publication No. 10-2004-0106959 (December 20, 2004) Republic of Korea Patent Registration No. 10-0717884 (May 07, 2007)

The present invention has been devised to solve the above problems, and more specifically, metal plating is performed on the surface of a nonwoven fabric manufactured through melt blown etc. to give antibacterial properties, thereby suppressing inhalation of viruses, bacteria, fungi, etc. It is about an antibacterial mask that can do it.

The present invention relates to an antibacterial mask.

One aspect of the present invention is

an endothelial layer in direct contact with the wearer's face;

an outer skin layer formed of a knitted fabric to form a space by bonding one surface and a certain portion of the inner skin layer; and

a non-woven fabric layer disposed in the space and including fibers plated with any one or a plurality of metals selected from copper, nickel, silver, gold, titanium, calcium and potassium on the surface;

includes,

Any one or a plurality of selected from the inner skin layer, the outer skin layer and the non-woven fabric layer comprises any one or a plurality of filaments selected from cotton fiber, rayon, polyester, polyolefin, polyamide, polyacryl and polyimide. It's about the mask.

In the present invention, the outer skin layer and the inner skin layer may be bonded with a hot melt adhesive formed in a dot-type pattern or web shape, and the hot melt adhesive is characterized in that a moisture curing hot melt adhesive and a thermoplastic hot melt are mixed.

In addition, the nonwoven layer may be formed by spinning any one or a plurality of polymer spinning solutions selected from polyester, polyamide, polyacrylic, thermoplastic elastomer and polyolefin through a melt blown process,

The outer skin layer is characterized in that cotton fibers of 10 to 100 cotton counts are knitted at a density of 15 to 40 gauge.

The mask according to the present invention has a nonwoven fabric layer plated with metal on the fiber surface between the outer skin layer and the inner skin layer, thereby exhibiting fine dust collecting power and having antibacterial properties against various strains and the like. In particular, due to its multi-layered structure, it effectively filters fine particles such as allergens, pollen, soot, yellow dust, and fine dust. It is suitable for use by medical personnel performing their duties.

The antibacterial mask according to the present invention will be described in more detail through the following specific examples or examples. However, the following specific examples or examples are only a reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

Also, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of effectively describing particular embodiments only and is not intended to limit the invention.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context specifically dictates otherwise.

The antibacterial mask according to the present invention has a configuration in which a multi-layered fabric or non-woven fabric is laminated, and specifically, an endothelial layer in direct contact with the wearer's face; a non-woven fabric layer formed on one surface of the inner skin layer; and an outer skin layer formed on one surface of the nonwoven fabric layer and formed of a knitted fabric, wherein the nonwoven fabric layer may be located in a space where the outer skin layer and the inner skin layer are formed by adhesion.

If each configuration is sequentially described based on the outer skin layer, the outer skin layer is responsible for the outermost part of the mask, has a structure that is breathable and easy for the wearer to breathe, and at the same time has a length "??* Can help with wearing.

The outer skin layer is not limited to a manufacturing method. For example, it can be manufactured by knitting through a circular knitting machine (circular knitting machine), in which case the circular knitting machine may be an automatic circular knitting machine in which all operations such as knitting operation, change of rotational speed, yarn replacement, and fiber and density change are automatically performed. have.

Specifically, the automatic circular knitting machine has a cylindrical needle cylinder (not shown) positioned on the outside of the cylinder shaft rotated by a motor, slots are arranged at specified intervals along the inner circumferential surface of the needle cylinder, and a knitting needle is installed between each slot It can be made possible to move up and down. And a sinker between the knitting needles is disposed so as to be perpendicular to the knitting needles may be configured to be movable in the front-rear direction by the cam.

And as the needle cylinder rotates by the cylinder shaft, the knitting needle sequentially descends and rises in a state in which the yarn is inserted, and as each sinker moves forward and backward, it continuously forms a loop and can be knitted in a cylindrical shape.

At this time, the outer skin layer may select the type and fineness of the fibers, knitting conditions, etc. according to the shape of the fabric. For example, in order to give a three-dimensional effect to the surface of the outer skin layer, as the knitting machine rotates, it may be knitted while sequentially reducing the number of knitting needles. A pattern or the like can also be formed by supplying each of these different fibers.

In addition, the outer layer may be made of two or more layers of knitted fabric, if necessary. At this time, when two or more layers of knitted fabrics are laminated as described above, the bonding method of each layer is not limited in the present invention, and as an example, a method such as sewing, adhesive, or compression using a heat-sealed fiber may be used.

The earring unit may be formed at both ends in the longitudinal direction of the outer skin layer as described above, and the earring unit uses the circular knitting machine, but operates only knitting needles as much as the width according to the set area of the earring unit, and the circular knitting machine operates in the forward and reverse directions It is preferable to form it to rotate.

As described above, the outer skin layer may control the fineness of the fibers and the density of the fabric in order to secure basic mechanical properties without interfering with the wearer's breathing. Specifically, the outer skin layer is preferably formed of cotton fibers having a cotton count of 10 to 100 at a density of 15 to 40 gauge. If the above range is not satisfied, the filtration efficiency may decrease due to the occurrence of pills or an increase in the size of pores due to deterioration of mechanical properties.

In addition, the outer skin layer may be used alone with cotton fibers, but since fluff is easy to occur, it may be mixed with synthetic fibers, and in addition to the cotton fibers, cellulose fibers such as hemp, wool, and animal fibers such as silk may be further included, The fiber composition as described above is not limited to only the outer skin layer, and may be applied to the production of the inner skin layer and the non-woven fabric layer, which will be described later.

The filament to be mixed with the cotton fiber is not particularly limited in material. Semisynthetic fibers such as rayon; polyolefins such as polyethylene and polypropylene; phthalate copolymers such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate; polyamide; polyacrylic; and polyimide; and the like.

As the filament, a variety of thermoplastic resins may be spun in addition to the synthetic or semi-synthetic fibers as described above. For example, it may include elastomeric resin fibers that are melted or softened at a low temperature in order to control the pore size of the nonwoven fabric and increase adhesion between the fibers. Examples of such a thermoplastic resin include polyolefin elastomer, polystyrene elastomer, polyester elastomer, polyamide elastomer and polyurethane elastomer.

Among these, a polyolefin elastomer that can easily spin a particularly thin fiber is preferable, and other components may be copolymerized within a range that does not impair the properties of the polymer. The melting point of the elastomer resin is not limited, but is preferably in the range of 60 to 120°C.

More preferably, the polyolefin elastomer is a random copolymer of olefin monomers. The random copolymer of polyolefin elastomer is a hydrocarbon having a double bond, and _{is represented by C n} H _2n (n is an integer of 2 to 10), such as ethylene, propylene, butene (butene), and at least one other monomer. It is a copolymer of different monomers of a species, in particular a random copolymer in which the monomers are arranged randomly.

Examples of the random copolymer are preferably a copolymer of ethylene and an olefin having 3 to 10 carbon atoms or a copolymer of propylene and an olefin having 4 to 10 carbon atoms. Furthermore, a copolymer comprising ethylene and an olefin having 3 to 10 carbon atoms is preferable. Examples of the olefin having 3 to 10 carbon atoms include propylene, 1-butene, 3-methyl-1-butene, 4-methyl-1-butene, 1-pentene, 1-hexene, and 4-methyl-1-pentene. , 1-heptene, 1-octene, 1-nonene, 1-decene, and the like.

Among the olefins, 1-butene, 1-pentene, 1-hexene and 1-octene are particularly preferable. In particular, these olefins can be used individually by 1 type or in combination of 2 or more types. Ethylene-olefin copolymers, such as an ethylene-octene copolymer and an ethylene-butene copolymer which combined these, are preferable. In addition, the molecular weight distribution (Mw/Mn) of the copolymer of ethylene and an olefin having 3 to 10 carbon atoms or propylene and an olefin having 4 to 10 carbon atoms used in the present invention is 1.5 to 4 in terms of radioactivity. desirable.

Commercial products of such polyolefin copolymer elastomers include, for example, "ENGAGE" (trade name, manufactured by The Dow Chemical Company), "Vistamaxx" (trade name, Exxon Mobil Corporation) Mobil Corporation) is exemplified.

In addition, the polyolefin copolymer used in the present invention may be a copolymer prepared by a metallocene catalyst. Incidentally, the polyolefin elastomer also includes a terpolymer obtained by adding a crosslinking diene monomer to an olefin, and specific examples thereof include ethylene-propylene-diene rubber and ethylene-butene-diene rubber.

Here, the filament may further include a monomer or polymer having a functional group that can be anionized most easily in order to impart chargeability, which will be described later. In particular, the above object can be achieved by electrical energy (corona, high-pressure charging), physical energy (frictional charging), or collision energy (hydro-charging) applied for charging the nonwoven fabric.

In the present invention, for example, of the functional group, sulfonic acid group, sulfonic acid ester group, carboxylic acid group, carboxylic acid ester group, thiocarboxylic acid group, thiocarboxylic acid ester group, dithiocarboxylic acid group, dithiocarboxyl group It may be at least one acidic functional group selected from the group consisting of an acid ester group and an acid anhydride group. Since the acid value and characteristics of the polymer are different depending on these functional groups, the type of the acid polymer can be changed and used according to the non-conductive thermoplastic polymer, which is the main component.

Monomers having such a functional group include vinylsulfonic acid, fumaric acid, itaconic acid, crotonic acid, maleic acid, acrylic acid, methacrylic acid, vinylthiocarboxylic acid, vinyldithiocarboxylic acid and esters thereof, and many other monomers. can be used With these monomers, an acidic polymer can be prepared through emulsion polymerization or solution polymerization used for general olefin polymerization, and general addition polymerization catalysts and additives can be used for polymerization. In addition, common monomers such as vinyltoluene, styrene, acrylamide, and vinyl acetate used in olefin polymerization can be used together to control the acid value, melt viscosity, and other physical properties of the acidic polymer.

The filament is not limited to an average fiber length, but may have a length of 10 to 100 nm. If the filament has a fiber length less than the above range, mechanical strength may decrease due to improper entanglement. This can fall.

The cross-sectional shape of the filament is not particularly limited, but may include a round cross-section, a flat cross-section, a deformed cross-section, and a hollow cross-section, and preferably, a ribbed triangular cross-section among the irregular cross-sections. In particular, when used as a mask, the mask around the mouth absorbs moisture by exhaled breath and may give discomfort to the wearer.

The fineness of the filament is preferably 1 to 10 denier. If the fineness is less than the above range, fine dust collection efficiency is high, but the cutting of filaments increases during braiding, which may lead to poor nonwoven processing. can

The method is not limited in the mixing or braiding of the cotton fiber and the filament. For example, it is preferable to mix 1 to 100 parts by weight of the filament relative to 100 parts by weight of the cotton fiber. When the weight ratio of the filament is added to less than 1 part by weight, mechanical properties, particularly tensile strength, may be greatly reduced, and when mixed with more than 100 parts by weight, cutting of the filament may occur during mixing.

In addition, the outer skin layer may further include a nasal cover if necessary. The nose cover part may be formed according to the control of a knitting program during the formation of the outer skin layer, or the length of the outer skin layer by adding a fabric different from the outer skin layer on one side of the outer skin layer.

For example, when the nose cover is formed through knitting, knitting is performed while the circular knitting machine rotates in the forward and reverse directions at the predetermined position of the nose cover. At this time, it is preferable to proceed while gradually reducing the number of knitting needles when knitting the nose cover to give a three-dimensional effect in order to increase the wearing comfort. In addition, when two or more layers of the outer skin layer are provided, the shape of the nasal cover can be entirely set according to the shape of the wearer's nose by further inserting a wire capable of fixing the shape between the layers.

In the present invention, the non-woven fabric layer is provided on the inner surface of the outer skin layer, and the surface includes fibers plated with metal, so that fungi, viruses and various strains can be removed due to the ionicity of the metal.

Although the manufacturing method of the nonwoven fabric layer is not limited, it is preferable to use a melt blown method to finely control the size of the pores and to simplify the manufacturing process of the nonwoven fabric as much as possible.

In this case, the meltblown nonwoven fabric is formed by extruding the molten thermoplastic material with a high-velocity gas (e.g., air) stream through a plurality of fine die capillaries, usually circular, to thin filaments of the molten thermoplastic material to increase their diameter, By means of a nonwoven fabric comprising fibers formed as molten treads or filaments, possibly by reducing the diameter to microfibers.

The meltblown fibers are carried by the high velocity gas stream and placed on a collecting surface to form a web of randomly dispensed meltblown fibers. Meltblown processes are well known and described in NRL Report 4364, "Manufacture of Super-Fine Organic Fibers", VA Wendt, EL Boone and CD Fluharty; NRL Report 5265, "An Improved device for the Formation of Super- Fine Thermoplastic Fibers", KD Lawrence, RT Lukas and JA Young) and in various patents and publications including US Pat. No. 3,849,241 to Buntin et al.

The melt blown nonwoven fabric is preferable because the fineness of the fibers can be miniaturized, so the pore size can also be miniaturized, and the surface area can be relatively maximized, thereby increasing antibacterial properties.

In the present invention, the type of fibers constituting the melt blown nonwoven fabric is not limited as long as it is a spun polymer. For example, the nonwoven fabric may include a polymer such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polyolefin. Specifically, the polyolefin may include polyethylene, polypropylene, polybutylene, etc., and polyester and polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and polyethylene naphthalate. In addition, polyamides such as nylon 6, nylon 6,6, nylon 10, and nylon 12, thermoplastic elastomers such as ethylene propylene rubber, styrenic block copolymers, copolyester elastomers and polyamide elastomers, and mixtures thereof may be included. The invention is not limited thereto.

In the present invention, a positive charge may be introduced into the nonwoven fabric layer by plating a metal on its surface. The positive charge as described above exhibits antibacterial properties in a manner that ruptures the bacterial cell by electrically pulling the negative charge on the surface of the bacterial cell.

In the present invention, the method of plating the metal on the nonwoven layer is not limited in the present invention, and any method such as electrolytic plating or electroless plating may be applied. For example, the nonwoven fabric layer is pretreated through steps such as degreasing, etching, surface adjustment, and neutralization, and then a catalyst is applied depending on the metal, and then the nonwoven fabric layer is immersed in a bath containing the metal ions. , heat or electricity may be applied to plated the nonwoven layer.

Specifically, when copper is plated on the surface of the nonwoven fabric layer, the surface is first degreased with an organic solvent such as diethyl propanediol or dipropylene glycol methyl ether, and then the CP face agent, sulfuric acid And it is immersed in a front face solution containing a solvent again to treat the face face. Then, the diluted hydrochloric acid is used as an acid neutralization solution to neutralize, _{and a catalyst such as palladium chloride (PdCl 2} ) and stannous chloride (SnCl ₂ ) may be applied to form a catalyst layer.

After the pretreatment as described above, a plating process may be performed to introduce metal ions to the surface of the nonwoven fabric layer. In this case, the metal is not limited in the present invention, and specifically, any one or a plurality of metals selected from copper, nickel, silver, gold, titanium, calcium, potassium, and the like may be used.

The metal may be more preferably copper or silver. The copper or silver has a strong ionization tendency, so that when applied to the surface of the fiber, antibacterial properties are remarkable, and it is preferable because the price is low compared to other metals and the plating process is not complicated.

For example, when copper is plated on the surface of the nonwoven fabric layer, copper sulfate, sodium hydroxide, formaldehyde and a solvent may be included as a plating solution, and the nonwoven fabric layer may be immersed in the plating solution and electrolytic or electroless plating may be performed.

The copper plating solution is for imparting conductivity to the surface of the non-conductive fiber material, and the copper plating solution may include copper sulfate, sodium hydroxide, formaldehyde and a solvent. The copper sulfate may supply copper ions capable of imparting conductivity to the fiber material, and formaldehyde may act as a reducing agent to promote copper precipitation. In addition, the sodium hydroxide has the effect of increasing the plating speed by adjusting the pH of the solution.

The copper plating solution may further include various additives as needed in addition to the above components. For example, in order to increase the ductility of the copper, ethylenedinitrilo-tetra-2-propanol (EDTP) may be further included, in addition to 2-2' dipyridyl (2-2' Dipyridyl), potassium ferrocyanide (Potassium ferrocyanide), 2-Mercapto benzo thiazole, Thio urea, Polyethylene glycol, Glycine, Sodium thiosulfate, Sodium carbonate ) and a stabilizer such as triethanolamine may be further added.

The copper plating solution is not limited in composition, plating temperature, plating time, etc., but may include 5 to 20 parts by weight of copper sulfate, 0.1 to 2 parts by weight of caustic soda, and 0.5 to 1 parts by weight of formalin based on 100 parts by weight of the solvent. In addition, the plating is preferably performed by immersion for 5 to 30 minutes at a temperature of 40 to 43 ℃.

In addition, when a silver component is included in the plating solution, it is preferable to immerse the nonwoven fabric pretreated as described above in a plating solution containing a silver complex compound. In the above method, when a reducing agent is added to the plating solution containing the silver complex in an electroless manner as described above, silver can be deposited and plated on the surface of the nonwoven fabric layer to be silver plated, so that plating can be performed effectively.

Examples of materials that can be used as the reducing agent include hydrazine (hydrazine, N ₂ H ₄ ), borohydride compounds (lithium borohydride, sodium borohydride, or aluminum borohydride), sodium hypophosphite (NaH ₂ PO ₂ ), and the like, The organic reducing agent includes formaldehyde (HCHO), acetaldehyde (CH ₃ CHO, benzaldehyde (C ₆ H ₅ CHO), _{acreroin (CH 2} =CHCHO), glucose, etc. Among them, glucose (glucose) ) is preferably used, and as the reducing agent aqueous solution, it is preferable to use an aqueous solution having a reducing agent concentration of 2 to 20 wt%.

The nonwoven fabric layer after the deposition is washed with purified water twice or more to complete the nonwoven fabric layer with metal plating on the surface. At this time, after washing with water, it is recommended to wash again with purified water mixed with sulfuric acid in about 5% by weight. This is to preserve the pH of the plating solution and at the same time activate the surface of the plated fiber material.

The endothelial layer is a part of the mask in direct contact with the skin or mouth, and has a condition in which there is no choice but to have a lot of moisture as it is directly in contact with breath or breath. Therefore, in this case, since microorganisms and fungi may proliferate, it is preferable to include one or more antibacterial substances in order to block them. In addition, since it is in direct contact with the skin, it is preferable to use a fiber that does not irritate the skin apart from having antibacterial properties as described above.

As fibers constituting the inner skin layer, it is preferable to include filaments and polylactic acid fibers containing antibacterial substances in cotton fibers.

In the present invention, the filament may include the synthetic fibers and semi-synthetic fibers described above, and specifically may include polyamide, polyester, polyolefin, polyacryl, rayon, etc. It is simple and at the same time, it is preferable because it can impart elasticity to the inner skin layer.

The antibacterial material is to impart antibacterial properties against bacteria having a negative charge by giving a positive charge to the fiber surface similarly to the metal. Materials can exhibit antimicrobial properties as they are exposed to the fiber surface.

The inorganic material that can be used as the antibacterial material, for example, may be any one or a plurality selected from cetylpyridinium chloride, benzoalkonium chloride, benzoethonium chloride, chlorhexidine hydrochloride and chlorhexidine gluconate.

Antibacterial substances as described above form cations on the fiber surface in the presence of moisture, and since the cations electrically attract anions formed on the surface of microbial cells, they can act in a manner that destroys the cell wall by this attractive force.

The antibacterial material is preferably included in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the filament fiber. When added below the above range, it may be difficult to secure antibacterial properties, and when added above the above range, skin irritation may occur.

The polylactic acid (lactic acid) fiber is a bio-based polymer and is a linear aliphatic polyester. It is a material produced by polymerizing a monomer obtained by chemical conversion of lactic acid produced by fermentation of starch mainly obtained from corn and potatoes.

As the polylactic acid fiber has a carboxyl group or an aldehyde group in the main chain, it has a negative charge on the surface. This negative charge can remove positively charged particles or bacteria that cannot be filtered from the non-woven fabric layer or filament having a positive charge on the surface as described above, thereby further enhancing antibacterial properties. .

The inner skin layer preferably contains 5 to 10 parts by weight of the filament and 10 to 30 parts by weight of the polylactic acid fiber to 100 parts by weight of the cotton fiber. If it is out of the above range, the above-mentioned antibacterial properties may not be expressed or the collection efficiency may be reduced and skin irritation may increase.

The inner skin layer is not limited to a manufacturing method, but is preferably made of a nonwoven fabric, and more preferably a spunlace method is applied.

The spunlace is a method in which short fibers or filaments are made into a web form and then water jets are entangled by high-pressure spraying, and then dried to produce a nonwoven fabric. First, a web is prepared by mixing and carding short fibers and filaments. , It can be produced by entangling in water by high-pressure jetting a liquid having a polarity on the web with a water jet.

The water jet is also called spun lace or water punch, and by spraying a high-pressure water stream onto the web to entangling the web, it gives strength to the web to improve mechanical properties. can be obtained

In general, there are two types of methods for imparting entanglement in a short fiber web: needle punching and spunlacing. In needle punching, when a reciprocating motion in the thickness direction of the web is performed using an iron needle having a barb on the surface, the fibers are entangled by the protrusion on the needle surface to produce a nonwoven fabric.

The needle punching nonwoven fabric has the advantage of being easily manufactured because the manufacturing process is simple. However, because the iron needle is used, the fibers are easily destroyed due to the reciprocating motion of the needle, which leads to deterioration of physical properties and the generation of dust, so the process continuity is poor. . In addition, due to the characteristics of the needle punch method, it is difficult to produce a lightweight product having a basis weight of 100 g/m3 or less, and it is difficult to use the needle punching nonwoven fabric as a mask because a number of holes of the size of the needle diameter are generated in the part through which the needle passes.

On the other hand, since spunlace uses a high-pressure water flow of 50 kg/cm 2 G or more as a fiber entanglement method, damage to the fibers can be very effectively avoided. Moreover, since no dust is generated, process continuity is excellent, the physical properties of the manufactured product are superior to needle punching, and the surface feel of the product is much more flexible, which is advantageous for manufacturing high-quality nonwovens. The weight range of the manufactured nonwoven fabric (sheet) can also cover a low weight (10g/m3) to a high weight (500g/m3) or more, so the flexibility of the facility is good.

The spunlace may be performed by passing the web through a machine having a plurality of nozzles and entangling the web through water flow entanglement treatment. At this time, the water flow entanglement treatment is, for example, passing the web through a device equipped with a nozzle plate in which one or multiple rows of liquid injection holes provided with a diameter of 0.01 to 0.5 mm and an interval of 0.1 to 2 mm are arranged, and the sprayed liquid is applied to the web. It is to entangle the fibers three-dimensionally by colliding with them.

The water pressure of the liquid fired through the liquid injection hole is preferably a water flow of about 10 to 200 kg/cm 2 (1 to 20 MPa), and the method of processing by passing the web through the machine once or twice or more desirable.

The injection holes are arranged in rows in a direction orthogonal to the traveling direction of the web, and the nozzle plate in which the injection holes are arranged in a direction perpendicular to the traveling direction of the web arranged on the porous support member at the same interval as the injection hole spacing It is desirable to make the water current uniformly impinge on the web by amplifying it. The porous support member for supporting the web, for example, a mesh screen such as a wire mesh or a perforated plate, is not particularly limited as long as the water flow can penetrate the web.

The distance between the injection hole and the web can be adjusted according to the water pressure, but is preferably 1 to 10 cm. If it is out of the above range, the mechanical properties of the nonwoven fabric may decrease or three-dimensional entanglement is impossible.

The inner skin layer, the outer skin layer, and the nonwoven fabric layer may be laminated by applying an adhesive between each layer for lamination and then pressing the adhesive. Specifically, the binder in the form of a film may be placed between the nonwoven sheets and adhered, or the nonwoven fabric may be overlapped and then re-entangled by putting it back into a spunlacer.

In the present invention, the binder is not limited to a type as long as it is commonly used in the art, and preferred examples thereof include a water-soluble or water-dispersible binder component. Among them, water-dispersible polyurethane, water-dispersible acrylic, and moisture It is preferable in terms of compatibility with the nonwoven fabric sheet, skin compatibility, air permeability, etc. to include any one binder component selected from the group consisting of acid type acrylic-urethane, water dispersion type polycarbonate, polyvinyl alcohol, and carboxymethyl cellulose.

Alternatively, the adhesive layer is preferably adhered with a hot melt (type) adhesive. The hot-melt adhesive is a solid material at room temperature using a thermoplastic resin, without dissolving or dispersing it in a solvent, and dissolving and applying only 100% solids by heat. It is an adhesive that shows adhesion in a short time. Compared to other solvent-based adhesives or water-dispersion adhesives, these adhesives do not require a drying process, so they have a small working space and fast bonding speed.

The hot melt adhesive is not limited to a type as long as it is commonly used for adhesion to leather, film, sheet, etc. in the art. As a material of the hot melt adhesive usable in the present invention, for example, any one selected from polyamide hot melt, polyester hot melt, polyurethane hot melt, polyolefin hot melt, polystyrene hot melt, ethylene-acrylic copolymer hot melt, and ethylene vinyl acetate hot melt Those in which the above polyolefin resin is a main component can be used.

The hot melt adhesive does not limit the melting temperature, but is preferably 150° C. or less in terms of easiness of operation and process conditions. In addition, the melt index (melt index) is preferably 5 to 500 ㎤ / 10min. In particular, when the melt index is 5 ㎤/10min or less, the adhesive force between the outer or inner layer and the moisture-permeable waterproof film may decrease. .

The hot-melt adhesive may have various pattern shapes so as not to impair air permeability while adhering each layer. For example, it may have a dot-type or web-type pattern, and when it has the pattern as described above, it is possible to provide adhesion between each layer at the same time without disturbing the wearer's breathing by the adhesive. .

More specifically, it is preferable to use a mixture of a moisture curing hot melt and a thermoplastic hot melt as the hot melt adhesive. That is, the basic adhesive force between each layer is given by the thermoplastic hot melt, and when the mask is used, the moisture contained in the inhalation or exhalation reacts with the isocyanate group at the end of the moisture-curable hot melt, and as time passes, the adhesive force of each layer decreases. It may have a further increasing effect.

Examples of the hot melt adhesive include polyamide hot melt, polyester hot melt, polyurethane hot melt, polyolefin hot melt, polystyrene hot melt, ethylene-acrylic copolymer hot melt and ethylene vinyl acetate hot melt, and these are used alone or in combination of two or more. It is also free to use

The adhesive layer including the adhesive is not limited to a formation method. For example, after preparing a thermoplastic hot melt and a moisture curing type hot melt of the hot melt adhesive, the thermoplastic hot melt type moisture curing type hot melt is separately applied to one surface of the outer or inner skin layer in the form of dots. In addition, if each layer is laminated and then pressed by applying heat, a mask in which an inner skin layer, a non-woven fabric layer, and an inner skin layer are sequentially stacked can be manufactured.

The mask according to the present invention has a nonwoven fabric layer plated with metal on the fiber surface between the outer skin layer and the inner skin layer, thereby exhibiting fine dust collecting power and having antibacterial properties against various strains and the like. In particular, due to its multi-layered structure, it effectively filters fine particles such as allergens, pollen, soot, yellow dust, and fine dust. It is suitable for use by medical personnel performing their duties.

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are only for explaining the present invention in detail, and the scope of the present invention is not limited by these examples.

The physical properties of the specimens prepared in the following Examples and Comparative Examples were measured as follows.

(collection efficiency)

First, the specimens prepared in Examples and Comparative Examples were left in advance at 38±2.5° C. and a humidity of 85±5% RH for 24±1 hours.

Then, a sodium chloride reagent was dissolved in water to make a 1% sodium chloride solution, and sodium chloride aerosol with an average particle diameter of 0.6㎛ was generated using an automatic filter inspection equipment. At this time, the flow rate of the sodium chloride aerosol is 95 liters per minute, and the concentration is 8 ± 4 mg/m 3 .

Next, the facial part of the specimen was put into an automatic filter inspection device, and the sodium chloride aerosol was passed through the facial part, and then the concentration before and after passing the facial part was measured, and it was calculated by substituting it in Equation 1 below. The measured value at this time was the average value obtained between 30±3 seconds, and was measured within 3 minutes after the start of the test.

[Equation 1]

(In Formula 1, C ₁ is the sodium chloride concentration before passing through the face, and C ₂ is the sodium chloride concentration after passing through the face.)

(Air permeability)

According to JIS L 1096:1999 8.27.1 Method A (Prasia method), the amount of ventilation when tested at a test pressure difference of 19.6 kPa was measured. A test piece of about 20 cm cm is taken from 5 different points of the sample, and the test piece is attached to one end of a cylinder with a diameter of 100 mm, fixed so that there is no air leakage at the attachment point, and the test pressure difference is 19.6 kPa using a regulator. Adjusted, the amount of air passing through the test piece at that time was measured with a flow meter, and the average of the five test pieces was calculated.

(antibacterial)

30 × 30 mm of the specimens prepared in the following examples were taken, and their sterilization reduction rate and bacteriostatic reduction rate were measured according to the antibacterial level measurement method of Korean Industrial Standard KS J 4206. Specifically, as test strains, the positively designated bacterium, Staphylococcus aureus (ATCC 6538), and the negatively designated bacterium, Klebsiella pneumoniae (negative, Klwbsiella pneumoniae: ATCC 4352) were used as test strains. , by inoculating the filament, the initial number of bacteria (Staphylococcus aureus: 1.4 × 10 ⁵ /ml, bacillus pneumoniae: 1.8 × 10 ⁵ /ml) and the number of bacteria at 18 hours after incubation were measured by substituting into the following Equations 2 and 3 .

[Equation 1]

[Equation 2]

(Here, M _a : the number of viable cells immediately after inoculation of the specimen without the addition of antibacterial substances.

M _b : Number of viable cells after 18 hours of incubation of the specimen without the addition of antibacterial substances

M _c : number of viable cells after 18 hours of incubation of the specimen with antibacterial substances added)

(Example 1)

A knitted fabric (fineness of 50, CM26S/2 100) was used as the outer skin layer, and a polyethylene terephthalate melt-blown nonwoven fabric was inserted into the laminated impeller as the nonwoven layer, and then the laminated impeller was installed in the bath. _{At this time, silver nitrate (AgNO 3} ) having a weight three times the weight of the nanofiber web in the bath and 800 ml of neutral water are dissolved in the bath, and sodium hydroxide (NaOH) having a weight twice the weight of the nanofiber web After adding 200 ml, the stacked impeller is stirred at low speed, and at this time, ammonia water is added while stirring, and then added in a fixed amount until it becomes transparent. After becoming transparent, a glucose reducing agent of 7,5 times the weight of the nanofiber web was added after covering the bath cover on the bath body, and after stirring at room temperature 25° C. for 24 hours, metal plating was performed on the nanofibers.

And a web containing 7 parts by weight of polyamide in 100 parts by weight of cotton fibers as an inner skin layer was prepared by a spunlace method to prepare a nonwoven fabric, but the fibers were mixed to prepare a sheet-shaped web. Then, the web was adjusted to 100 g/m 3 and then the web was water-punched while supplying water at a water pressure of 100 kg/cm 2 using a nozzle formed with a nozzle diameter of 0.1 mm and a nozzle density of 16/cm 2 to prepare a nonwoven fabric.

Next, a thermoplastic hot melt adhesive (polyurethane-based) was applied in the form of dots on one surface of the outer and inner layers, respectively, and then thermocompression bonding was performed to complete the specimen. The physical properties of the prepared specimens were measured and shown in Table 1 below.

(Example 2)

Specimens were prepared in the same manner as in Example 1, except that 5 parts by weight of cetylpyridinium chloride was added to 100 parts by weight of the polyamide spinning solution and spun by adding 5 parts by weight of the polyamide fiber used for the inner skin layer. The physical properties of the prepared specimens were measured and shown in Table 1 below.

(Example 3)

In Example 2, when preparing the inner skin layer, a web in which 7 parts by weight of polyamide fiber and 20 parts by weight of polylactic acid fiber in which 5 parts by weight of cetylpyridinium chloride was added to 100 parts by weight of cotton fiber was mixed was used. was prepared. The physical properties of the prepared specimens were measured and shown in Table 1 below.

(Comparative Example 1)

A specimen was prepared in the same manner as in Example 1, except that the nonwoven layer was not laminated. The physical properties of the prepared specimens were measured and shown in Table 1 below.

(Comparative Example 2)

Specimens were prepared in the same manner as in Example 1, except that a melt-blown nonwoven fabric made of polyethylene terephthalate without metal plating on the surface was used as the nonwoven fabric layer. The physical properties of the prepared specimens were measured and shown in Table 1 below.

[Table 1]

As shown in Table 1, it can be seen that the masks prepared in Examples 1 to 3 have excellent collection efficiency and bacteriostatic reduction rate compared to Comparative Examples 1 and 2, except for air permeability. Specifically, as more polyamide and polylactic acid containing cetylpyridinium chloride, an antibacterial substance, were added to the inner skin layer, the collection efficiency was finely increased due to the refinement of pores. It can be seen that there is a significant increase. It can be confirmed that different electric charges on the polyamide and polylactic acid fibers are charged to the surface, increasing the dust collection efficiency, and the attractive force is expressed to express the bacteriostatic reduction rate against the strain, thereby improving the antibacterial efficiency.

On the other hand, although the detailed description of the present invention has been specifically described with reference to preferred embodiments, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims described below as well as the claims and equivalents.

Claims (5)

an endothelial layer in direct contact with the wearer's face;
an outer skin layer formed of a knitted fabric to form a space by bonding one surface and a certain portion of the inner skin layer; and
a non-woven fabric layer disposed in the space and including fibers plated with any one or a plurality of metals selected from copper, nickel, silver, gold, titanium, calcium and potassium on the surface;
includes,
Any one or a plurality of selected from the inner skin layer, the outer skin layer and the non-woven fabric layer comprises any one or a plurality of filaments selected from cotton fiber, rayon, polyester, polyolefin, polyamide, polyacryl and polyimide. Mask.
The method of claim 1,
The antibacterial mask, characterized in that the outer skin layer and the inner skin layer is adhered with a hot melt adhesive formed in a dot-type pattern or web-type.
3. The method of claim 2,
The hot-melt adhesive is an antibacterial mask, characterized in that a moisture-curing hot-melt adhesive and a thermoplastic hot-melt are mixed.
The method of claim 1,
The non-woven fabric layer is an antibacterial mask, characterized in that it is formed by spinning any one or a plurality of polymer spinning solution selected from polyester, polyamide, polyacrylic, thermoplastic elastomer and polyolefin through a melt blown process.
The method of claim 1,
The outer skin layer is an antibacterial mask, characterized in that the cotton fibers of 10 to 100 cotton counts are knitted with a density of 15 to 40 gauge.