KR101549498B1 - Air filtering cover for electric fan - Google Patents

Abstract

The present invention relates to an air filtering cover for an electric fan. A filter unit of an air filtering cover for an electric fan is manufactured by felt made by using fabrics processed by a specific fiber processing agent. A filter unit is manufactured by selectively using fabrics having retardant additives and thiol-based additives or felt coated by silica particles or light stabilizer. The air filtering cover of the present invention enables the filter unit made of felt in accordance to the present invention to show a performance of electrification due to static electricity while inputted air moves towards a front side of an electric fan to collect dust and the like included in the inputted air; thereby purifying air in a space where the electric fan is used.

Description

{AIR FILTERING COVER FOR ELECTRIC FAN}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an air purifying cover for a fan, and more particularly to an air purifying cover for a fan having excellent dust collecting efficiency.

An electric fan is a machine that gives a cool feeling by blowing wind by rotating a wing installed on an axis of an electric motor in the room. The thing that feels cool with a fan is that it sweeps the sweat of the skin and other liquid secretions with airflow, and takes away the heat of vaporization. The electric fan was invented by T.A. Edison, and it was gradually developed, and the electric device covered with the protection net before and after the Second World War was studied and advanced to beautiful and sophisticated made of plastic now.

Depending on the shape and purpose, the fan can be equipped with a table fan, a stand fan, a ventilation fan, a ceiling fan, a tandem fan, etc. The state-of-the-art fan can automatically control the wind speed Some programs have been designed to allow you to sleep comfortably.

The main parts of the fan structure are the stand, the support, the motor, the wing (fan), the protection net, and the shaking device. Mostly, the angle of the swing or the up / down / left / right can be freely adjusted, and the up and down of the support can be freely adjusted. In addition, the front operation is adopted in which all the devices are concentrated on the front surface of the stand so that they can be operated easily.

The fan may be dirty with dust or the like attached to parts such as wings during use or during storage.

KR 10-1184038 B1

An object of the present invention is to provide an air purifying cover for an electric fan which is excellent in the collection efficiency of dust and the like and is continuously maintained.

In order to achieve the above-mentioned object, the first embodiment of the present invention is characterized in that, in order to achieve the above-mentioned object, the first embodiment of the present invention is arranged so as to cover an electric fan safety net surrounding the fan, A barrel portion provided with a first tightening portion formed by sewing a fastening string having elasticity; A second hole formed in the center of the second hole, the second hole formed in the second hole, the second hole formed in the second hole, And a filter portion provided with two tightening portions.

In order to achieve the above object, according to a second aspect of the present invention, there is provided an air conditioner comprising: an annular fan which is disposed to cover a fan safety net surrounding the fan, And a filter portion having a fastening portion formed by sewing so as to be caught by the stabilizing net, and a fastening portion formed by sewing a fastening string along an inner circumference of the annular shape.

In the first or second embodiment of the present invention, the filter portion

There is provided an air purifying cover for an electric fan manufactured from a nonwoven fabric made of fibers treated with a fiber treatment agent containing at least one selected from the group consisting of compounds represented by the following formulas (1), (2) and (3)

[Chemical Formula 1]

(2)

(3)

In the above formula R ^1, R ^2, R ³ are each independently a hydroxyl group, a polyoxyethylene group or a polyoxypropylene group, R ⁴ is a group having a carbon number of 16 saturated to 30 or an unsaturated aliphatic hydrocarbon group, R ⁵ is a carbon number of 12 to A saturated or unsaturated aliphatic hydrocarbon group having 1 to 30 carbon atoms, R ⁶ is a hydrogen group or a methyl group, and k is an integer of 5 to 50.

In the present invention, the fiber is selected from the group consisting of trisnonyl phenyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, distearyl pentaerythritol diphosphite, bis (2,4- (2,6-di-t-butylphenyl) pentaerythritol phosphite, 2,2-methylenebis (4,6-di- , Bis (2,4-bis (1,1-dimethylethyl) -6-methylphenyl) ethyl ester (2,4-diisopropylphenyl) -4,4'-biphenylene diphosphonite, (2,4-di-t-butylphenyl) -4,4'-diyl bisphosphonite, bis (2,4-di- 5-methylphenoxy) phosphino); And dilauryl-3,3'-thiodipropionate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, pentaerythritol tetrakis Based on the total weight of the composition.

In the present invention, the nonwoven fabric may include silica fine particles having a particle diameter of 4 to 200 nm on its surface.

In the present invention, at least one light stabilizer selected from a hindered amine compound, a triazine-based compound, and a benzotriazole-based compound may be attached to the nonwoven fabric.

The air purifying cover for an electric fan according to the present invention is characterized in that when the fan is operated in a state where it is installed in a fan, the filter portion made of the nonwoven fabric according to the present invention during the movement of the introduced air toward the front of the fan, It is possible to purify the air in the space where the fan is used by collecting dust or the like contained in the introduced air.

The chargeable fibers used in the nonwoven fabric for fabricating the filter portion constituting the air purifying cover for an electric fan according to the present invention may be obtained by attaching a nonionic fiber treatment agent composed of sorbitan fatty acid esters or polyoxyalkylene alkyl ethers, Therefore, in the non-woven fabric processing by the air-laid device or the carding device, the occurrence of static electricity is suppressed and the removal process such as the cleaning process of the fiber processing agent is not required in the heat electret process of the non-woven fabric, It is possible to charge the electrostatic charge necessary and sufficient for the performance of the workpiece and it is not necessary to control the amount of attaching and holding by the heat history. Therefore, various nonwoven fabric processing conditions such as needle punches can be used for the web obtained from such a fiber.

Further, in the present invention, by using the fibers containing the phosphorus additive and the thio-based additive, it is possible to improve the charging performance and obtain a charging nonwoven fabric having a higher initial collecting efficiency than the charging nonwoven fabric using the fibers not containing these additives . In addition, by adding an amount of the above additive in a certain amount or more, high collection efficiency can be maintained.

Further, in the present invention, by adhering specific fine silica particles to the surface of the nonwoven fabric, the charging effect of the electret treatment can be sustained for a long period of time.

Further, in the present invention, by coating a light stabilizer such as a hindered amine compound, a triazine-based compound or a benzotriazole-based compound on the fiber surface of the nonwoven fabric, the charging effect imparted by the electret treatment can be enhanced.

1 is a front perspective view of an air purifying cover for an electric fan according to a first embodiment of the present invention;
FIG. 2 is a rear perspective view of FIG. 1. FIG.
3 is an explanatory view showing the use state of the air purifying cover for the fan of FIG.
4 is a front perspective view of an air purifying cover for a fan according to a second embodiment of the present invention.
Fig. 5 is a rear perspective view of Fig. 4; Fig.
6 is a view showing the use state of the air cleaner cover for the fan of FIG.

Hereinafter, the present invention will be described in detail.

The present invention relates to an air purifying cover for a fan including a filter portion made of a nonwoven fabric.

1 and 2 are perspective views of an air purifying cover 100 for a fan according to a first embodiment of the present invention. FIG. 3 illustrates an example of a fan 200 equipped with the air purifying cover 100 for a fan in FIG. .

Generally, an electric fan safety net 220 made of synthetic resin or metal is installed in the electric fan 200 to prevent a safety accident caused by the fan blades 210 generating a wind due to driving of a motor (not shown) . This fan safety net 220 is disposed so as to surround the fan blades 210 so as to smoothly rotate the fan blades 210. The air purifying cover 100 for an electric fan according to the first embodiment of the present invention, The safety net 220 is covered.

The air purifying cover 100 for a fan according to the first embodiment of the present invention is composed of a bulb 110 and a filter 120.

The duct 110 is disposed so as to cover the fan safety net 220 that surrounds the fan blades 210 so as to surround the fan blades 210. The fan 110 is ventilated and has a first hole 111 formed at the center thereof, And a first throttle 112 formed by sewing a string having elasticity along an edge of the first throttle 112.

The filter unit 120 is disposed adjacent to the ventilation part 110 to cover the fan safety net 220 and is ventilated. A second hole 121 is formed on the center side of the filter unit 120, And a second throttle 122 formed by sewing a string having elasticity along the edge of the hole 121.

The filter unit 120 is made of a nonwoven fabric made of fibers treated with a fiber treatment agent containing at least one compound selected from the compounds represented by the formulas (1), (2) and (3).

The air purifying cover 100 for a fan according to the first embodiment of the present invention is configured such that when the fan 200 is operated in a state where the fan 200 is installed, And the air introduced into the filter unit 120 moves toward the front of the fan 200 as shown in FIG. 3, the filter unit 120 exhibits a charging performance due to the static electricity, The air in the use space of the fan 200 can be cleaned by collecting the dust and the like contained therein.

4 to 5 are perspective views of an air purifying cover 100 'for an electric fan according to a second embodiment of the present invention. FIG. 6 is a perspective view of a fan 200 having an air purifying cover 100' .

The air purifying cover 100 'for an electric fan according to the second embodiment of the present invention includes the air permeable portion 110 in the air purifying cover 100 for an electric fan according to the first embodiment of the present invention shown in Figs. And the filter unit 110 '.

The filter unit 110 'is disposed so as to cover the fan safety net 220 which surrounds the fan blades 210 away from the fan blades 210. The filter unit 110' has an annular shape having a hole 111 ' And a tightening portion 114 'formed by sewing a tightening string 113' along the inner periphery of the annular shape is provided in the upper portion .

The filter unit 110 'is made of a nonwoven fabric made of fibers treated with a fiber treating agent containing at least one selected from the compounds represented by Chemical Formulas 1, 2 and 3.

The air purge cover 100 'for an electric fan according to the second embodiment of the present invention is configured such that the air introduced into the holes 111' 6, the filter unit 110 'exhibits a charging performance due to static electricity while moving the air toward the front of the fan 200, so that the dust and the like contained in the introduced air The air in the use space of the fan 200 can be cleaned.

In the first embodiment or the second embodiment of the present invention, the nonwoven fabric used for manufacturing the filter part 120, 110 'may be made of a chargeable fiber which does not require a cleaning step of the fiber treatment agent. When the nonwoven fabric is made of chargeable fibers, the collecting efficiency of dust and the like can be greatly improved.

The non-woven fabric processed articles of the present invention are generally produced by staple fibers or short-cut fibers as a raw cotton by a processing method such as a carding method or an air-laid method, ), And then electret treatment is applied to the nonwoven fabric obtained by heat fusion or physical entanglement. The electret treatment is a step of charging the nonwoven fabric by heat electretization, corona discharge electretization or the like at the time of processing the nonwoven fabric or after forming the nonwoven fabric.

Generally, a fiber treatment agent (emulsion) such as a surfactant is adhered to the surface of the fiber used for nonwoven fabric processing in order to suppress the workability and workability of the nonwoven fabric due to the generation of static electricity. However, such a fiber treatment agent not only interferes with the electret treatment in the case of a nonwoven fabric-treated product, but also causes deterioration of the collecting efficiency over time.

Therefore, in the electret treatment process of the nonwoven fabric, a method of introducing a washing process such as secondary washing or bathing, or a method of washing and removing the oiled agent while being entangled by a water-jet method is used, There is a problem such as an increase in process facilities and an increase in manufacturing cost. There is also a method of making nonwoven fabrics and electrets by reducing the amount of the oil adhered in the heat treatment step. However, there is a restriction that a heat treatment step is necessarily required before electret processing. A high quality control technique is required.

In the present invention, in a dry nonwoven fabric processing step such as a so-called surface process or an air-laid process, a fiber to which an emulsion is adhered is used so as not to impair the processability by the generation of static electricity. The present invention is characterized in that a nonwoven fabric is made by using a chargeable fiber which can easily carry out electret treatment without being restricted by a processing method such as a change or introduction of a washing step.

In the present invention, as a result of intensive researches for making the above chargeable fibers, it has been confirmed that a fiber and a nonwoven fabric processed product which can easily carry out electret treatment can be provided by using a specific nonionic fiber treating agent , And the present invention has been accomplished on the basis thereof.

The fiber treatment agent used in the chargeable fiber of the present invention may be composed of only a sorbitan fatty acid ester or a polyoxyalkylene alkyl ether but may also contain an antioxidant, a preservative, a waterproofing agent, an antibacterial agent, a wettability improver (hydrophilic agent) Can be compounded within a range that does not inhibit the effect of the present invention.

The sorbitan fatty acid esters are compounds having a structure represented by the following formula (1) or (2).

[Chemical Formula 1]

(2)

Wherein R ¹ , R ² and R ³ are each independently a hydroxyl group, a polyoxyethylene group or a polyoxypropylene group, and R ⁴ is a saturated or unsaturated aliphatic hydrocarbon group having from 16 to 30 carbon atoms. The degree of polymerization of the polyoxyethylene group and the polyoxypropylene group (constituent units of the ethylene oxide group or the propylene oxide group) may be independently 0 to 55.

The sorbitan fatty acid esters are classified as nonionic surfactants and have high wettability and viscosity.

Specific examples of the sorbitan fatty acid ester used in the chargeable fiber of the present invention include sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan sesquioleate, Sorbitan tristearate, sorbitan monoisostearate, coconut oil fatty acid sorbitan and the like. Examples of polyoxyethylene derivatives of sorbitan fatty acid esters include polyoxyethylene derivatives such as poly Polyoxyethylene (EO = 4) sorbitan monolaurate, polyoxyethylene (EO = 4) sorbitan tristearate, polyoxyethylene (EO = 4) sorbitan trioleate, polyoxyethylene (EO = Polyoxyethylene (EO = 6) sorbitan monooleate, polyoxyethylene (EO = 6) sorbitan monostearate Polyoxyethylene (EO = 20) monococonut oil fatty acid sorbitan, polyoxyethylene (EO = 20) sorbitan monopalmitate, polyoxyethylene (EO = 5) sorbitan monolaurate, polyoxyethylene = 20) sorbitan monolaurate, polyoxyethylene / polyoxypropylene sorbitan monolaurate, polyoxyethylene (EO = 20) sorbitan monostearate, polyoxyethylene (EO = 20) sorbitan monoisostearate , Polyoxyethylene (EO = 20) sorbitan monooleate, polyoxyethylene (EO = 20) sorbitan trioleate, and polyoxyethylene (EO = 20) sorbitan tristearate. The sorbitan fatty acid esters used in the present invention are not particularly limited to these.

When the sorbitan fatty acid ester is contained as a main component of the fiber treatment agent, the sorbitan fatty acid ester may be blended in an amount of 50% by weight or more, preferably 60 to 70% by weight based on the total weight of the fiber treatment agent. As other components to be blended, any non-ionic surfactant is preferable, and these surfactants are also used to enhance the emulsification and preservative effect of the fiber treatment agent. As the nonionic surfactant, a polyoxyalkylene alkyl ether may also be included.

On the other hand, the polyoxyalkylene alkyl ether is a compound having a structure represented by the following general formula (3).

(3)

In the above formula, R ⁵ is a saturated or unsaturated aliphatic hydrocarbon group having 12 to 30 carbon atoms, R ⁶ is a hydrogen group or a methyl group, and k is an integer of 5 to 50.

The carbon number of R ⁵ is preferably 12 or more in order to suppress the friction between the fibers and maintain good moldability, and the carbon number of 30 or less is suitable for industrial production without difficulty in synthesizing the polyoxyalkylene alkyl ether. It is more preferable that the carbon number of R ⁵ is 18 to 30. The value of k in the formula is preferably 10 to 25.

Specific examples of the polyoxyalkylene alkyl ether used in the chargeable fiber of the present invention include polyoxyethylene (k = 20) behenyl ether, polyoxyethylene (k = 14) stearyl ether, polyoxyethylene (k = 20 Polyoxyethylene (k = 5) lauryl ether, polyoxyethylene / polyoxyethylene (k = 10) triacontanyl ether, Propylene (the constituent unit of ethylene oxide is 2, the constituent unit of propylene oxide is 6, and all of k = 8) lauryl ether, and the like. However, the polyoxyalkylene alkyl ether used in the present invention is particularly limited to these It is not.

When the polyoxyalkylene alkyl ether is contained as a main component of the fiber treatment agent, the polyoxyalkylene alkyl ether may be blended in an amount of 50 wt% or more, preferably 60 to 70 wt%, based on the total weight of the fiber treatment agent. As other components to be blended, any non-ionic surfactant is preferable, and these surfactants are also used to enhance the emulsification and preservative effect of the fiber treatment agent. As non-ionic surfactants, sorbitan fatty acid esters may also be included.

The fibrous treating agent used in the chargeable fiber of the present invention contains at least one selected from the above-mentioned sorbitan fatty acid esters and polyoxyalkylene alkyl ethers as a main component in the above-mentioned weight ratio, and the other is a nonionic component ≪ / RTI > That is, it is preferable that the fiber treating agent used in the present invention is composed of a nonionic component and does not contain an ionic component. However, insofar as the effect of the present invention is not impaired, a small amount of an ionic component may be contained depending on the purpose. The fiber treatment agent can be used in a state dissolved in water as required.

In the chargeable fiber of the present invention, the adherence amount of the fiber treating agent comprising a sorbitan fatty acid ester and / or a polyoxyalkylene alkyl ether as a main component to the fibers is 0.01 to 1.5% by weight based on the total weight of the fibers, 0.15 to 1.0% by weight. When the deposition amount is 0.15% by weight or more, the generation of static electricity can be appropriately suppressed, and the workability and atmosphere of the nonwoven fabric are improved. When the amount is 1.5% by weight or less, electrification of the nonwoven fabric during electret treatment is not inhibited by the fiber treating agent, and the electret property of the nonwoven fabric is also improved.

The chargeable fiber of the present invention may be a fiber using a spinnable thermoplastic resin as a raw material. For example, the thermoplastic resin may be a single fiber melt-spun from a homogeneously mixed resin or two or more thermoplastic resins A composite fiber that has been spin-spinned can be used.

Examples of the thermoplastic resin include polyolefins such as polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, binary or ternary copolymers of propylene and other? Polyamides; Polyesters such as polyethylene terephthalate, polybutylene terephthalate, low-melting polyesters obtained by copolymerizing a diol with terephthalic acid / isophthalic acid, and polyester elastomers; A fluororesin and a mixture of the above resins.

In the case where the chargeable fiber of the present invention is a composite fiber, it may be a composite fiber such as a sheath-core type, a side-by-side type, a multilayer type of two or more layers, a hollow multilayer type, Can be used. At this time, it is preferable that the difference in melting point of the thermoplastic resin is 10 ° C or higher, and that the low melting point thermoplastic resin among the thermoplastic resins constituting the fibers is exposed at least at part of the surface of the fibers and is continuous along the length direction of the fibers By heat treatment at a temperature not lower than the softening point or melting point of the low melting point thermoplastic resin and lower than the melting point of the high melting point thermoplastic resin by the heat treatment so that the low melting point thermoplastic resin of the composite fiber is melted and the three- A thermally adhesive nonwoven fabric having a state structure can be formed.

When the conjugate fiber used in the chargeable fiber of the present invention is composed of two kinds of thermoplastic resins of a low melting point thermoplastic resin and a high melting point thermoplastic resin, examples of the combination include high density polyethylene / polypropylene, low density polyethylene / Ethylene / butene-1 crystalline copolymer, ethylene-propylene copolymer / polypropylene, high density polyethylene / polyethylene terephthalate, nylon-6 / nylon-66, low melting point polyester / low density polyethylene / polypropylene, low density polyethylene / propylene- Polyethyleneterephthalate, polypropylene / polyethylene terephthalate, polyvinylidene fluoride / polyethylene terephthalate, a mixture of linear low density polyethylene and high density polyethylene / polyethylene, and the like. Preferably, the composite fiber is composed of a polyolefin-based component. Examples of the knitting of the low melting point thermoplastic resin / high melting point thermoplastic resin include high density polyethylene / polypropylene, ethylene-propylene copolymer / .

The weight ratio of the low melting point thermoplastic resin and the high melting point thermoplastic resin constituting the conjugate fiber used in the chargeable fiber of the present invention is 10 to 90% by weight of the low melting point thermoplastic resin and 10 to 90% by weight of the high melting point thermoplastic resin, Preferably 30 to 70% by weight of the low melting point thermoplastic resin and 70 to 30% by weight of the high melting point thermoplastic resin. When the low melting point thermoplastic resin is less than 10% by weight, the thermal adhesiveness becomes insufficient, and the nonwoven fabric strength when the nonwoven fabric is processed is lowered. On the other hand, when the content of the low melting point thermoplastic resin exceeds 90% by weight, it becomes impossible for the high melting point thermoplastic resin as the core component to maintain the fiber form.

In the conjugated fiber used in the chargeable fiber of the present invention, a resin (denaturant) containing a polymer composed of a vinyl monomer having a reactive functional group at a low melting point component continuously exposed along the longitudinal direction may be contained in a part of the fiber surface have. The modifier is a resin having a reactive functional group. Examples of the reactive functional group include a group such as hydroxyl group, amino, nitrile, nitrilo, amide, carbonyl, carboxyl and glycidyl. The modified polyolefin can be polymerized using the vinyl monomer having the reactive functional group, and any of block, random, ladder copolymer and graft polymer can be used. Examples of the vinyl monomer having a reactive functional group include unsaturated carboxylic acids and derivatives thereof selected from maleic anhydride, maleic acid, acrylic acid, methacrylic acid, fumaric acid and itaconic acid; Or a vinyl monomer containing at least one anhydride; Styrenes such as styrene and? -Methylstyrene; Methacrylic acid esters such as methyl methacrylate, ethyl methacrylate, 2-hydroxyethyl methacrylate, and dimethylaminoethyl methacrylate; Or a vinyl monomer containing at least one of the same acrylic ester, glycidyl acrylate, glycidyl methacrylate, butene carboxylic acid esters, allyl glycidyl ether, 3,4-epoxy butene, 5.6-epoxy- - hexene, vinylcyclohexene monoxide, and the like.

As the modifier, it is generally preferable to have the vinyl monomer having the reactive functional group at a modification ratio of 0.05 to 2.0 mol / kg with respect to the total weight of the modifier, more preferably 0.05 to 1.0 mol / kg. The content of the modifier is preferably 80% by weight or less, more preferably 50% by weight or less, and most preferably 20% by weight or less based on the weight of the sheath component of the conjugated fiber from the viewpoints of cost and radioactivity .

From the viewpoint that the modifying agent is highly adhesive to other cellulose-based fibers or inorganic materials when constituting the nonwoven fabric and reacts with the fiber treating agent to increase the chargeability of the chargeable fiber of the present invention, the unsaturated carboxylic acid or And a modified polyolefin composed of a vinyl monomer and a polyolefin composed of the derivative can be preferably used.

Among the modified polyolefins, the modified polyolefin which is a graft polymer is more preferably usable because it has a high polymer strength and a good fiber formability. The modifying ratio is preferably within a range that does not hinder the fiber processability and the effect of the present invention .

As the backbone polymer of the modified polyolefin, polyethylene, polypropylene, polybutene-1 and the like can be used. As the polyethylene, high-density polyethylene, linear low-density polyethylene, low-density polyethylene may be used. These are polymers having a density of 0.90 to 0.97 g / cm 3 and a melting point of about 100 to 135 ° C. As the polypropylene, a propylene homopolymer or a copolymer of propylene and other? -Olefin containing propylene as a main component may be used. These are polymers having a melting point of about 130 to 170 캜. Polybutene-1 is a polymer having a melting point of about 110 to 130 占 폚. Among these polymers, polyethylene is preferable in view of the melting point, copolymerization and ease of graft polymerization, and high-density polyethylene having a high polymer strength is more preferable for improving the nonwoven fabric strength.

As the low melting point component containing the modified polyolefin, a modified polyolefin alone, a mixture of at least two modified polyolefins, a mixture of at least one modified polyolefin with another thermoplastic resin, or the like can be used. The modified polyolefin generally tends to lower the strength of the polymer as compared with the unmodified polyolefin. Therefore, in order to keep the fiber strength higher, a mixture of the modified polyolefin having a high modification ratio and the unmodified polyolefin And it is particularly preferable to use a polymer such as a backbone polymer of a modified polyolefin from the viewpoint of compatibility.

When the modifier is mixed with another thermoplastic resin, it is preferable to use a modifier having a high modification ratio of about 0.1 mol / kg or more. By using the modifier, the adhesiveness between the chargeable fiber of the present invention and other cellulose-based fibers or inorganic materials is improved, and the chargeability of the chargeable fiber of the present invention is improved. It is presumed that the fibrous treatment agent and the reactive functional group of the modifier present on the fiber surface react with each other to improve the charging property. It is also preferable to mix with a thermoplastic resin such as a backbone polymer constituting the modifier.

The thermoplastic resin constituting the chargeable fiber of the present invention may contain an antioxidant, a light stabilizer, an ultraviolet absorber, a neutralizer, a nucleating agent, an epoxy stabilizer, a lubricant, an antibacterial agent, a flame retardant, a pigment, Other thermoplastic resin or the like may be added.

The fineness of the chargeable fiber of the present invention is not particularly limited, but a range of 0.2 to 100 denier can be preferably used. When the nonwoven fabric containing the chargeable fiber of the present invention is used as the filter member, a fineness in the range of 0.5 to 30 deniers can be preferably used although it depends on the object to be trapped and the required air permeability.

The chargeable fiber of the present invention is generally used alone or mixed with other fibers such as nylon and formed into a web by a known processing method such as a carding method or an air-laid method, and the web is heat- Or by mechanically entangling the fibers by a water-jet method or the like. The chargeable fiber of the present invention may be deposited on another nonwoven fabric, film, pulp sheet, knitted fabric, or the like to form a composite nonwoven fabric.

The nonwoven fabric using the chargeable fiber of the present invention or the composite nonwoven fabric may be a nonwoven fabric, a fiber, a film or the like obtained by other processing methods such as a carding method, an air-laid method, a wet paper making method, a spun-bond method and a melt- , A pulp sheet, a knitted fabric, a woven fabric, a wood-like plate, or a metal sheet to form a composite nonwoven fabric.

When the chargeable fiber of the present invention is subjected to the nonwoven fabric processing by the air-laid method, it is necessary to drop the fibers so that the fibers are uniformly dispersed through the sieve or screen. Therefore, it is preferable to use short fibers having a fiber length of 3 to 40 mm. If the fiber length exceeds 40 mm to a large extent, the uniform dispersion tends to become difficult, and the unevenness of the fabric tends to occur in the nonwoven fabric. On the other hand, when the fiber length is less than 3 mm, not only the strength of the nonwoven fabric when processed into a nonwoven fabric is lowered but also the bulkiness characteristic of the air-laid method tends to be lost.

Examples of the web manufacturing apparatus used in the air-laid process include a box-shaped sieve-type apparatus for dropping short fibers from the openings of the screen by vibrating with one of forward, backward, left and right, Can be used. It is also possible to use a net-like cylindrical type apparatus in which a metal porous plate on a net is formed into a cylindrical shape, a fiber inlet is provided at the side surface thereof, and fibers are dispersed and dropped from the opening of the net.

When the chargeable fiber of the present invention is web-processed by a carding machine, it is preferable to use fibers having a fiber length of 32 to 120 mm. If fibers having a fiber length exceeding 120 mm are excessively worn by the web, the fibers tend to warp around the rollers of the carding machine, and if less than 32 mm, formation of the web may become insufficient.

The number of crimp of the chargeable fiber of the present invention is not particularly limited, but is preferably in the range of 3 to 20 acid / 25 mm when the web is formed by a carder, because the formation of the web is favorable. At this time, when the number of crimps is less than 3/25 mm, the strength of the resultant nonwoven fabric is lowered, and if it exceeds 20/25 mm, the entanglement of the fibers becomes large to lower the openability of the fibers and it may be difficult to obtain a uniform web or nonwoven fabric have. The shape of the crimp can be any shape such as a zigzag shape, a two-dimensional crimp, a spiral shape, a three-dimensional three-dimensional crimp such as an Ohm type, and the like.

The number of crimp of the chargeable fiber of the present invention is not particularly limited, but in the case of web-forming by the air-laid method, the range of 0 to 15 acid / 25 mm is preferable because the formation of the web becomes favorable. At this time, if the number of crimp exceeds 15/25 mm, the entanglement between the fibers becomes large and the openability of the fibers decreases, and it may be difficult to obtain a uniform web or nonwoven fabric. The shape of the crimp can be any shape such as a zigzag shape, a two-dimensional crimp, a spiral shape, a three-dimensional three-dimensional crimp such as an Ohm type, and the like.

The web obtained by the air-laid method or the carding method using the chargeable fiber of the present invention is processed into a nonwoven fabric by heat treatment or mechanical entanglement of fiber intersections. The heat treatment is carried out by using an apparatus which fuses the intersections of the fibers by heating at a temperature equal to or higher than the softening point or melting point of the low melting point thermoplastic resin or lower than the melting point of the high melting point thermoplastic resin and employs an apparatus for heat treatment such as an air- A heat treatment machine or the like can be used. In particular, the web obtained by the air-laid method is preferable because it can obtain a bulk nonwoven fabric by using an air-through type heat treatment machine. In addition, mechanical entanglement is a method capable of entangling the web mechanically by high-pressure water or a needle, and is preferable for obtaining a nonwoven fabric having a soft touch. Since the chargeable fiber of the present invention does not necessarily require the cleaning of the fiber treating agent or the infiltration of the component by the thermal history, the nonwoven fabric can be made of such a needle.

Hereinafter, a process for producing a thermosetting conjugate fiber for use in the chargeable fiber of the present invention will be described.

A cis-core type nipple having a sheath component and a high melting point thermoplastic resin as a core component, or an eccentric sheath-core type nipple having a low melting point thermoplastic resin as a core component so that the low melting point thermoplastic resin forms at least part of the surface of the fiber, To release the thermoplastic resin by a melt-spinning apparatus usually used. At this time, the thermally adherable composite fiber in an unstretched state is produced by blowing by a quench directly under the nip and cooling the semi-molten thermoplastic resin. At this time, the discharge amount of the molten thermoplastic resin and the drawing speed of the non-drawn yarn are set arbitrarily, and the unstretched yarn having a fiber length of about 1 to 5 times the target fineness is obtained. In addition, the ratio of the low-melting point thermoplastic resin forming the fiber surface is preferably 50% or more at the cross-sectional circumference of the fiber, because it is strong enough in the case of 50 to 100%, and at the same time, Not necessarily. The obtained undrawn yarn can be stretched by a commonly used stretching machine to obtain a drawn yarn (thermosetting conjugated fiber before crimping). In addition, in the normal case, the stretching treatment is carried out so that the ratio between the rolls heated to 40 to 120 占 폚 and the rolls is in the range of 1: 1 to 1: 5. The obtained drawn yarn is crimped by a box-shaped crimping machine to form a tow.

The process of adhering the fiber treatment agent may be a method of attaching the fiber treatment agent on a kiss roll at the time of drawing the undrawn fiber or a method of adhering it by a touch roll method, a dipping method, a spraying method, . The tow is dried at 60 to 120 ° C using a drier and cut by a press cutter to an arbitrary fiber length suitable for the application.

The nonwoven fabric using the chargeable fiber of the present invention can be obtained by a method such as a column electret method in which electric charge is given in a heating atmosphere to such an extent that a low melting point component of the fiber is not melted or electret treatment such as corona discharge method in which charge is given by corona discharge , It is possible to charge the nonwoven fabric with a charge to give the nonwoven fabric characteristics such as a collecting function. The electret treatment method is not particularly limited.

The nonwoven fabric using the chargeable fiber of the present invention can be obtained by, for example, an air-laid method or a carding method as described above. The basis weight of the nonwoven fabric is not particularly limited, but may be, for example, 10 to 1000 g / m 2.

The air purifying covers 100 and 100 'for an electric fan according to the present invention can cut and fabricate the nonwoven fabric using the above-described chargeable fibers in an appropriate form to manufacture the filter units 120 and 110'. The air purifying cover 100, 110 'for the fan can be a cover for storing the fan used for storing the fan 200, or a cover for covering the fan safety net 220 while the fan is in use.

In addition, phosphorus additive and thio-based additive may be contained in the fibers used for manufacturing the filter unit 120, 110 'in the present invention. In the present invention, the charging performance can be improved by using the fibers containing the phosphorus additive and the thio-based additive, and an electrification nonwoven fabric having a higher initial collecting efficiency than the charging nonwoven fabric using the fibers containing no such additives can be obtained . In addition, by adding an amount of the above additive in a certain amount or more, high collection efficiency can be maintained. Even if the addition amount of the phosphorus additive is increased, the initial collection efficiency of the electrified nonwoven fabric is not improved to a certain level or more. However, the initial collection efficiency can be improved by using the thio-based additive in combination. Further, other additives such as phenol-based and amine-based additives may be contained in the fibers in addition to phosphorus-based additives and thio-based additives. The phosphorus additive is preferably contained in the fiber in an amount of 0.01 wt% or more, and more preferably in an amount of 0.2 wt% or more.

Examples of the phosphorus additive include trisnonylphenyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, distearylpentaerythritol diphosphite, bis (2,4- (2,6-di-t-butyl-4-methylphenyl) pentaerythritol phosphite, 2,2-methylenebis (4,6-di-t-butylphenyl) octylphosphite, Tetrakis (2,4-di-t-butylphenyl) -4,4'-biphenylene diphosphonite, bis (2,4-bis (1,1-dimethylethyl) (2,4-di-t-butylphenyl) (1,1-biphenyl) -4,4'-diyl bisphosphonite, bis (2,4- -Methylphenoxy) phosphino) and the like can be preferably used.

If the phosphorus-containing additive is contained in the fiber in an amount of 0.2 wt% or more, the collection efficiency tends to be less likely to be lowered due to the lowering of the charging ability accompanying particle collection, so that the minimum collection efficiency can be increased. This tendency becomes more pronounced with an increase in the amount of the phosphorus additive. Preferably, the phosphorus additive is contained in the fiber in an amount of 0.3 wt% or more, more preferably 0.6 wt% or more. However, if the additive is contained too much, the radioactive property of the fiber deteriorates. Therefore, the total amount of the phosphorus-based additive and the thio-based additive should preferably be not more than 5 wt%, more preferably not more than 2 wt% Or less.

In the present invention, the fibers used for manufacturing the filter units 120 and 110 'may include a phosphorus-based additive and a thio-based additive. Examples of the thio-based additive include dilauryl-3,3'-thiodipropionate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, Erythritol tetrakis, and the like can be preferably used. When the thio additive is co-present with the phosphorus additive, the initial collection efficiency of the obtained electrified nonwoven fabric can be improved as compared with the case where only the phosphorus additive is used. The thio-based additive is preferably contained in the fiber in an amount of 0.01% by weight or more, more preferably 0.1% by weight or more, because the initial collection efficiency is further improved.

Further, in the present invention, by adhering specific fine silica particles to the surface of the nonwoven fabric, the charging effect of the electret treatment can be sustained for a long period of time.

In the present invention, the silica fine particles may be impregnated with colloidal silica suspended in water once, adhered to the nonwoven fabric by means of spray or the like, and then dried at a temperature below the melting point of the fiber to be carried on the fiber surface. Thereby forming a nonwoven fabric.

Further, in order to impart effective electrification by electret treatment, the particle size of silica needs to be 4 to 200 nm. Preferably, the particle size of the silica is in the range of 10 to 100 nm, and more preferably the particle size of the silica is in the range of 40 to 70 nm. A good charging effect can not be obtained even when the particle diameter of the silica is less than 4 nm or exceeds 200 nm.

The amount of the silica fine particles to be supported is preferably 0.4 to 3% by weight based on the total weight of the supported nonwoven fabric. More preferably 0.5 to 1.5% by weight. If the loading amount of the fine silica particles is too small or too large, the effect of maintaining the high voltage is small.

The silica fine particles are preferably colloidal silica suspended in a colloidal form in water. To explain the method of supporting the silica fine particles on the nonwoven fabric, the colloidal silica is diluted with water, the appropriate suspension concentration is adjusted, and then the nonwoven fabric is impregnated with the nonwoven fabric by spraying, coating or the like, dried, and electret treated .

In the present invention, the surface of the fibers of the nonwoven fabric used for manufacturing the filter units 120 and 110 'may be coated with a light source such as a hindered amine compound, a triazine compound, a benzotriazole compound, By coating the tablets, the charging effect imparted by the electret treatment can be enhanced.

The light stabilizer used in the present invention is a light stabilizer containing a nitrogen-containing cyclic structure, and may specifically be a hindered amine compound, a triazine compound, a benzotriazole compound, or the like.

A light stabilizer containing a nitrogen-containing cyclic structure is generally used as an additive for imparting light stability to a polymer in general. However, the form at ordinary temperature is solid (powder or granule), insoluble in water, Or not evenly adhered to and / or coated on the surface of the fibers. Therefore, in order to adhere (coat) these compounds to the fiber surface, it is necessary to liquefy them. From the viewpoint of the working environment, it is preferable to carry out water-solubilization or emulsification without using an organic solvent. By making it water-soluble or emulsified in this way, special modifications are not required in the non-woven fabric manufacturing process or the raw cotton spinning process, and the existing facilities can be used as they are.

In the present invention, the amount of the lightened or emulsified light stabilizer adhered to the fiber surface is 0.05 to 5 parts by weight, preferably 0.1 to 3 parts by weight, per 100 parts by weight of the fiber component. If the amount is less than 0.05 parts by weight, persistence of the charging effect of the electret treatment is not exhibited. If the amount is more than 5 parts by weight, further improvement of the effect can not be obtained and it is economically disadvantageous.

Among the hindered amine compounds, the hindered amine compounds having a molecular weight of 2000 or more having a molecular weight of at least 2000 include poly [(6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine- (2,2,6,6-tetramethyl-4-piperidyl) imino) hexamethylene ((2,2,6,6-tetramethyl-4-piperidyl) N, N ', N', N ', N'-tetramethylpiperidine polycondensate of dimethyl-1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6- -Tetrakis- (4,6-bis- (N - methyl-2,2,6,6-tetramethylpiperidin-4-yl) amino) 4,4-diazadecane-1,10-diamine, dibutylamine / 1,3,5-triazine / N, N'-bis (2,2,6,6-tetramethyl- And polycondensation products of 1,6-hexamethylenediamine and N- (2,2,6,6-tetramethyl-4-piperidyl) butylamine.

Examples of the hindered amine type compound having a molecular weight of less than 2000 and having a low molecular weight type include bis (1,2,2,6,6-pentamethyl-4-piperidyl) {[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl] methyl} butyl malonate, decane diacid bis (2,2,6,6-tetramethyl-1 (octyloxy) -4-piperidinyl) ester , Reaction products of 1,1-dimethylethyl hydroperoxide and octane, and bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate.

Examples of the triazine compound include 2- (4,6-diphenyl ether-1,3,5-triazin-2-yl) -5 - [(hexyl) oxy] -phenol, 2,4- Dimethylphenyl) -6- (2-hydroxy-4-isooctyloxyphenyl) -s-triazine.

Examples of the benzotriazole-based compound include compounds having a low melting point and a relatively high melting point such as 2- (2 H-benzotriazol-2-yl) 4-6-bis (1-methyl- (2H-benzo) triazol-2-yl) -4,6-di-tert-butylphenol, 2,2 ' Methylene bis [6- (2H-benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol].

The method of hydrolyzing a hindered amine compound, a triazine compound, and a benzotriazole compound is not particularly limited, but it can be realized by neutralization treatment with an acid as an example, and when it is difficult, alcohol can be added to neutralize it. For example, the compound may be added and stirred into an aqueous solution containing hot water and acetic acid to carry out the water-solubilization. In addition, emulsification can be performed using an emulsifier (surfactant). The hindered amine-based compound, triazine-based compound and benzotriazole-based compound that have been hydrated can be used in combination, or these premixed raw materials can be simultaneously water-soluble.

The method of adhering the water-soluble compound to the surface of the fiber is not particularly limited. However, the method of fixing the fibers of the web formed by opening and releasing the first short fiber surface by mechanical entanglement and / or thermal fusion to form a nonwoven fabric In the process, there is a method of attaching the compound by impregnation, spraying or coating. Secondly, there is a method of compounding a compound which is water-soluble in an emulsion used in a spinning process of a fiber and adhering it to the surface of the spinning fiber to provide it on the surface of a short fiber for nonwoven fabric. Third, there is a method in which the compound is impregnated, sprayed or coated on a previously formed nonwoven fabric in a subsequent step. The above methods can be appropriately selected based on the production method of the nonwoven fabric. For example, in the case of a thermal bond nonwoven fabric, any of three methods can be preferably used. Needle punch method In the case of nonwoven fabrics, the second method is simple. In the case of the wet process nonwoven fabric and the spun lace nonwoven fabric, the third method is preferable for the process.

[Example]

Hereinafter, the present invention will be described with reference to Examples and Comparative Examples, but the present invention is not limited thereto. The measurement method or definition of the property is as follows.

The crimp number was measured in accordance with JIS-L-1015.

The single fiber fineness was measured according to JIS-L-1015.

The basis weight was expressed in terms of the weight per unit area (g / m 2) of the entire molded article cut into a 50-cm square nonwoven fabric.

The adhesion amount (%) of the fiber treatment agent is a value obtained by extracting a fiber treatment agent adhered to fibers from 2 g of the dried fiber with 25 ml of methanol, evaporating the methanol from the extracted methanol, weighing the remaining residue, and calculating a weight ratio to the fiber.

When the atmospheric dust (0.3 to 5 탆) was passed through the nonwoven fabric at a speed of 5 cm / min using a particle measuring device (particle counter-KC-01 (0.3 to 5 탆) manufactured by Leion Co., Ltd.) The amount of dust collected on the nonwoven fabric is measured and is calculated as a percentage from the total amount of dust that has passed through the nonwoven fabric.

The nonwoven fabric workability is a value obtained by sensibly comparing and evaluating the workability of the nonwoven fabric by the air-laid method or the carding method from the quality of the obtained nonwoven fabric and the dispersibility of the fibers. (Good), (good), (poor), and good (good) in that the obtained nonwoven fabric had good quality, openness and dispersed state of fibers.

Table 1 shows the components of the fiber treatment agents used in Examples 1 to 7 and Comparative Examples 1 to 3 and the mixing ratios thereof. Table 2 shows the conditions for producing the composite fibers obtained by adhering these fiber treatment agents. In addition, a method of attaching the fiber treatment agent was a touch roll method and a spraying method in a kiss roll method in a spinning process or a drawing process. In addition, fibers having a crimp number of 10 to 13 acid / 25 mm were used.

[Examples 1 to 4, 7 and Comparative Examples 1 to 3]

A web having a basis weight of 100 g / m < 2 > was formed by the air-laid method using each of the fibers shown in Table 2 and passed through an air-through heat treatment machine at 138 DEG C to form a nonwoven fabric. This was supported for 1 minute in an atmosphere at 90 deg. C, and then a voltage of 10 kV was applied for 2 seconds to fabricate an electret nonwoven fabric. Thereafter, the filter units 120 and 110 'of the air purifying covers 100 and 100' for the fan are manufactured using the fabricated nonwoven fabric.

Fiber treatment agent ingredient Weight ratio (%) Ionic Textile treatment agent 1 Polyoxyethylene sorbitan monostearate (EO = 20) 100 Nonionic Textile Treatment 2 Polyoxyethylene lauryl ether (EO = 5) 100 Nonionic Textile Treatment 3 Polyoxyethylene / polyoxypropylene lauryl ether
(EO = 2, PO = 6) 100 Nonionic Fiber treatment agent 4 Polyoxyethylene sorbitan monooleate 30 Nonionic Sorbitan monolaurate 70 Textile Treatment 5 Polyoxyethylene saturated alkyl ether 65 Cationic
Nonionic Multiple salts of cationic surfactants and anionic surfactants 30 Silicone emulsifier 5 Fiber treatment agent 6 Sorbitan monolaurate 20 Cationic
Nonionic Sorbitan monostearate 60 POE sorbitan monolaurate 10 Dioctylsulfosuccinate 10

fiber
Treatment agent Thermoplastic resin Sys / Core
ratio Radiation temperature Stretching temperature Fineness Fiber length Sys Side Core side ℃ ℃ dtex mm Example 1 One HDPE PP 50/50 250 80 1.0 5 Example 2 2 HDPE PP 50/50 250 90 2.2 5 Example 3 3 HDPE PP 50/50 250 80 2.2 5 Example 4 4 HDPE /
Denatured PE PP 65/35 250 90 1.7 3 Example 5 4 Co-PP PP 40/60 250 90 2.2 51 Example 6 4 HDPE PP 50/50 250 80 2.2 51 Example 7 4 HDPE PP 50/50 250 80 1.0 3 Comparative Example 1 none
(Bath cleaning) HDPE PP 50/50 250 80 2.2 5 Comparative Example 2 5 HDPE PP 50/50 250 80 2.2 5 Comparative Example 3 6 HDPE PP 50/50 250 80 2.2 5

In the above table, PP is crystalline polypropylene, HDPE is high density polyethylene having a density of 0.960 g / cm < 3 >, denatured polyethylene is high density polyethylene having a density of 0.960 g / cm3 as a backbone polymer, maleic anhydride and styrene are mixed and graft copolymerized (Ethylene content: 3.5% by weight) having a density of 0.922 g / cm < 3 >, and a mixture ratio of denatured PE (0.35 mol / kg of maleic anhydride and 0.30 mol / Was 7.5% by weight based on the total weight of the sheath-side thermoplastic resin.

[Example 4]

A nonwoven fabric was produced under the same air-laid process conditions as in Example 1 using the chargeable fibers obtained by blending denatured PE with the sheath-side thermoplastic resin (HDPE) shown in Example 4 of Table 2. [ This was supported for 1 minute in an atmosphere at 90 deg. C, and then a voltage of 10 kV was applied for 2 seconds to fabricate an electret nonwoven fabric. Thereafter, the filter units 120 and 110 'of the air purifying covers 100 and 100' for the fan are manufactured using the fabricated nonwoven fabric.

[Example 5]

As shown in Example 5 of Table 2, a tow formed by using an ethylene-propylene copolymer (ethylene component: 3.5% by weight) having a density of 0.9222 g / cm3 and a sheath-side thermoplastic resin was cut into a fiber length of 51 mm, A web having a target basis weight of 100 g / m < 2 > was formed by a carding method and passed through an air-through heat treatment machine at 138 DEG C to produce a nonwoven fabric. This was supported for 1 minute in an atmosphere at 90 deg. C, and then a voltage of 10 kV was applied for 2 seconds to fabricate an electret nonwoven fabric. Thereafter, the filter units 120 and 110 'of the air purifying covers 100 and 100' for the fan are manufactured using the fabricated nonwoven fabric.

[Example 6]

A web having a target basis weight of 100 g / m < 2 > was formed by the carding method using the fibers (tow cut to 51 mm in fiber length) shown in Example 6 of Table 2 and passed through a needle punch processor to produce a nonwoven fabric. This was supported for 1 minute in an atmosphere at 90 deg. C, and then a voltage of 10 kV was applied for 2 seconds to fabricate an electret nonwoven fabric. Thereafter, the filter units 120 and 110 'of the air purifying covers 100 and 100' for the fan are manufactured using the fabricated nonwoven fabric.

[Example 7]

As shown in Example 7 of Table 2, a nonwoven fabric was produced using the same thermoplastic resin and working conditions as in Example 1, except that the fiber treating agent 4 was used and the fiber length was 3 mm. This was supported for 1 minute in an atmosphere at 90 deg. C, and then a voltage of 10 kV was applied for 2 seconds to fabricate an electret nonwoven fabric. Thereafter, the filter units 120 and 110 'of the air purifying covers 100 and 100' for the fan are manufactured using the fabricated nonwoven fabric.

[Comparative Example 1]

The non-woven fabric produced under the same conditions as in Example 1 was washed with water to clean the fiber treating agent, and then electret processed to produce a nonwoven fabric. Thereafter, the filter units 120 and 110 'of the air purifying covers 100 and 100' for the fan are manufactured using the fabricated nonwoven fabric.

[Comparative Examples 2 to 3]

A nonwoven fabric was produced under the same conditions as in Example 1, except that sorbitan fatty acid esters or polyoxyethylene alkyl ethers were used as the fiber treating agent, but a fiber treating agent to which other cationic components were added was also used. Thereafter, the filter units 120 and 110 'of the air purifying covers 100 and 100' for the fan are manufactured using the fabricated nonwoven fabric.

The collecting efficiencies of the electret nonwoven fabrics of Examples 1 to 7 and Comparative Examples 1 to 3 were measured. The results of the collection efficiency and the adhering fat content (amount of adhered fiber treatment agent) are shown in Table 3.

fiber
Treatment agent Fineness
(dtex) Basis weight
(g / m 2) Maintenance minute
(%) Collection efficiency
(%) Non-woven
Processability Example 1 One 1.0 119 0.88 61.8 ○ Example 2 2 2.2 118 0.62 48.3 ○ Example 3 3 2.2 125 0.31 49.6 ○ Example 4 4 1.7 84 0.30 50.1 ◎ Example 5 4 2.2 100 0.42 60.0 ◎ Example 6 4 2.2 100 0.30 45.3 ◎ Example 7 4 1.0 104 0.31 21.7 ◎ Comparative Example 1 none 2.2 110 0 56.0 ◎ Comparative Example 2 5 2.2 115 0.25 8.7 ◎ Comparative Example 3 6 2.2 109 0.52 9.3 ◎

Although the collecting efficiency is a collecting rate of the dust when the atmospheric dust passes through the nonwoven fabric, it can be considered that it reflects the trapping rate of the dust collected by the electrostatic effect of the nonwoven fabric. Therefore, this was used as an index of the chargeability of the nonwoven fabric . The fibers with high collection efficiency exhibit excellent chargeability.

Since the collecting efficiency equivalent to that of Comparative Example 1 in which the conventional bale treatment is performed can be obtained in Examples 1 to 6, the chargeable fiber of the present invention does not need to clean the fiber treating agent. In addition, it was found that heat history is not necessarily required after / after the nonwoven fabric processing, and good electrification is exhibited in electret processing. That is, by using the chargeable fiber of the present invention, it is possible to obtain electret fibers suitable for various nonwoven fabric processing steps such as the needle punching method and the air-through method without going through the multi-step layer processing step. However, in the ionic textile treatment agents of Comparative Examples 2 and 3, most of the electrification property by electret processing was not observed. This can be attributed to the fact that the electricity charged to the fiber is discharged through the ionic component present in the fiber treatment agent. Further, in Examples 4 and 5 using the same fiber treatment agent as in Example 7, it was considered that the result of electret treatment showing remarkably excellent charging performance (collection efficiency) was that the thermoplastic resin constituting the fiber was different , The effect of the present invention can be further enhanced by the selection of the thermoplastic resin. That is, the electrostatic support ratio after electrification by electret processing depends greatly on the fiber constituent resin, and it is one of the preferred embodiments of the present invention to use a thermoplastic resin containing a modifier.

Further, since the fiber treatment agent 4 exhibits good results both in the electrification property in electret processing and in the workability of the nonwoven fabric, it can be considered that the fiber treatment agent has a component ratio of the fiber treatment agent within a preferable range.

The chargeable fiber of the present invention can be efficiently processed by suppressing the generation of static electricity in the process of processing the non-woven fabric by using an air-laid machine or a carder, and when the electret process is performed, It can be applied to the air purifying cover 100, 100 'for an electric fan which requires a dust collecting effect.

[Examples 8 and 9, Comparative Examples 4 and 5]

Tris (2,4-di-t-butylphenyl) phosphite as a phosphorus-based additive and dimyristyl-3,3'-thiodipropionate as a thio-based additive were added as shown in Table 4 below. The filter portions 120 and 110 'of the air purifying covers 100 and 100' for the fan were manufactured in the same manner as in Example 1, except that they were used.

Phosphorus additive
(weight%) Thio-based additive
(weight%) Initial collection efficiency
(%) Minimum collection efficiency
(%) Example 8 0.7 0.2 85 66 Example 9 0.1 0.2 79 53 Comparative Example 1 0.1 0 66 45 Comparative Example 2 0.7 0 68 53

[Test Example 1]

Table 5 shows the relationship between the particle size of the fine silica particles carried on the fiber surface and the charge retention performance. In this example, colloidal silica having different particle diameters was attached and supported on the fiber surface of the nonwoven fabric at 1 wt% (dry weight), and then a voltage of 10 kV was applied to the nonwoven fabric test piece, and the magnitude of the nonwoven fabric was measured , And the retention ratio (%) with respect to the initial voltage after the application was measured. The initial voltage of the nonwoven fabric immediately after the application was 4 kV. In addition, the time (half-life) at which the large voltage was halved was also measured.

Elapsed time
1 minute Elapsed time
2 minutes Elapsed time
3 minutes Elapsed time
4 minutes Elapsed time
5 minutes Half-life
sec Untreated 23.4 12.6 9.7 8.2 7.6 18 Particle size
1-3 nm 50.4 36.5 31.2 26.7 22.3 98 Particle size
10-20 nm 86.3 82.7 80.5 77.9 74.6 552 Particle size
40-50 nm 87.9 83.5 80.7 78.0 75.5 1680 Particle size
70-100 nm 85.2 82.0 79.9 77.9 77.2 1080 Particle size
100-200 nm 65.4 52.4 46.3 43.0 42.1 476

As can be seen from Table 5, the maintenance effect (persistence) of charging was small when the particle size was less than 4 nm, and the maintenance effect was small even if it was larger than 100 nm. Therefore, it was confirmed that the most preferable range of the particle diameter was 40 to 50 nm.

Claims (5)

And a first tightening part formed by sewing a tightening string having elasticity along an edge of the first hole, wherein the first tightening part is formed by covering the safety net covering the fan safety net, Conduit; And
A second fastening member which is adjacent to the airflow passage and is positioned so as to cover the fan safety net, is ventilated, has a second hole formed on the center side thereof, and a second fastening string formed by sewing an elastic fastening string along the edge of the second hole And a filter unit provided with the filter unit,
Wherein the filter portion is made of a chargeable nonwoven fabric made of fibers treated with a fiber treatment agent containing at least one selected from compounds represented by Chemical Formulas 1, 2 and 3,
The fibers may be selected from the group consisting of trisnonyl phenyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, distearyl pentaerythritol diphosphite, bis (2,4- (2,6-di-t-butyl-4-methylphenyl) pentaerythritol phosphite, 2,2-methylenebis (4,6-di- t-butylphenyl) octylphosphite, tetra Bis (2,4-di (t-butylphenyl) -4,4'-biphenylene diphosphonite, bis (2,4- (2,4-di-t-butylphenyl) (1,1-biphenyl) -4,4'-diyl bisphosphonite, bis (2,4- Methylphenoxy) phosphino); And dilauryl-3,3'-thiodipropionate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, pentaerythritol tetrakis A thio group-containing additive,
Wherein the chargeable nonwoven fabric includes silica fine particles having a particle diameter of 4 to 200 nm on its surface,
Wherein at least one light stabilizer selected from a hindered amine compound, a triazine-based compound, and a benzotriazole-based compound is attached to the chargeable nonwoven fabric,
[Chemical Formula 1]

(2)

(3)

In the above formula R ^1, R ^2, R ³ are each independently a hydroxyl group, a polyoxyethylene group or a polyoxypropylene group, R ⁴ is a group having a carbon number of 16 saturated to 30 or an unsaturated aliphatic hydrocarbon group, R ⁵ is a carbon number of 12 to A saturated or unsaturated aliphatic hydrocarbon group having 1 to 30 carbon atoms, R ⁶ is a hydrogen group or a methyl group, and k is an integer of 5 to 50. And an engagement portion formed by sewing so as to cover the safety net of the fan surrounding the fan and surrounding the fan safety net and being hooked to the fan safety net along the outer circumference of the annular shape having a hole at the center side, And a filter portion having a tightening portion formed by sewing a tightening string along an inner circumference,
Wherein the filter portion is made of a chargeable nonwoven fabric made of fibers treated with a fiber treatment agent containing at least one selected from compounds represented by Chemical Formulas 1, 2 and 3,
The fibers may be selected from the group consisting of trisnonyl phenyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, distearyl pentaerythritol diphosphite, bis (2,4- (2,6-di-t-butyl-4-methylphenyl) pentaerythritol phosphite, 2,2-methylenebis (4,6-di- t-butylphenyl) octylphosphite, tetra Bis (2,4-di (t-butylphenyl) -4,4'-biphenylene diphosphonite, bis (2,4- (2,4-di-t-butylphenyl) (1,1-biphenyl) -4,4'-diyl bisphosphonite, bis (2,4- Methylphenoxy) phosphino); And dilauryl-3,3'-thiodipropionate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, pentaerythritol tetrakis A thio group-containing additive,
Wherein the chargeable nonwoven fabric includes silica fine particles having a particle diameter of 4 to 200 nm on its surface,
Wherein at least one light stabilizer selected from a hindered amine compound, a triazine-based compound, and a benzotriazole-based compound is attached to the chargeable nonwoven fabric,
[Chemical Formula 1]

(2)

(3)

In the above formula R ^1, R ^2, R ³ are each independently a hydroxyl, a polyoxyethylene group or a polyoxypropylene group, R ⁴ is a group having a carbon number of 16 saturated to 30 or an unsaturated aliphatic hydrocarbon group, R ⁵ is a carbon number of 12 to A saturated or unsaturated aliphatic hydrocarbon group having 1 to 30 carbon atoms, R ⁶ is a hydrogen group or a methyl group, and k is an integer of 5 to 50. delete delete delete

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