KR20210020352A - Air cleaner - Google Patents

Abstract

The present invention relates to an air cleaner, and more specifically, to the air cleaner with excellent deodorizing performance. The air cleaner comprises an inlet unit, a deodorizing filter, an outlet unit, and a container body.

Description

Air cleaner

The present invention relates to an air purifier, and more particularly, to an air purifier having excellent deodorization performance.

Recently, modern people live about 80% of a day in indoor spaces such as houses, offices, and underground spaces. For modern people who spend most of their time indoors, a comfortable indoor environment can increase work efficiency. It is emerging as a very important factor in maintaining health. In particular, as the standard of living of humans improves, the demand for a more comfortable indoor environment is increasing.

However, in general, air in a closed space increases the content of odors and harmful gases over time due to breathing or smoking by the guest, which interferes with the breathing of the guest. It is mixed and causes discomfort to the inhabitants.

In order to solve such an unpleasant feeling, air purifiers capable of removing dust, odors, and harmful gases from indoor air are being developed in various forms. Recently, air purifiers having not only an air purifying function, but also a humidity control function such as dehumidification, have been developed and distributed.

Conventional air purifiers include a filter that removes dust and odor components contained in the air sucked into the body, a blower that induces air flow so that air is sucked into the body, and the filter is purified through the filter. It includes a humidity control unit provided with a thermoelectric element for adjusting the humidity of the air. The blower also serves to dissipate heat from the heat sink of the humidity control unit.

Meanwhile, a filter used in an air purifier is generally provided with a deodorizing filter for removing dust and odor components, and the deodorizing filter is implemented by providing various deodorants in a nonwoven fabric.

There can be various methods of imparting a deodorant to the nonwoven fabric.For example, activated carbon, which is a representative deodorant, is a representative method, dry coating in which dry activated carbon is scattered with hot melt and adhered between the nonwoven fabrics. It can be divided into a method and a wet coating method in which activated carbon is treated and attached by a wet coating method with a binder. At this time, a filter manufactured by a wet coating method is mainly used as a deodorizing filter for an air purifier.

On the other hand, in order to increase the deodorizing efficiency, it is important to attach a large amount of activated carbon to the nonwoven fabric support regardless of the method of attaching the activated carbon. In particular, in order to attach activated carbon to the nonwoven fabric support through a wet coating method using a binder, the material and internal structure of the nonwoven fabric support play an important role.

The conventional nonwoven fabric for activated carbon coating was mainly a cellulose-based wet nonwoven fabric, which was manufactured using a papermaking method, which is a wet laid method. In order to manufacture such a commercial wet nonwoven fabric, a huge investment in equipment is required, and the pore size of the produced wet nonwoven fabric is small, so the porosity and air permeability are small, and it is not easy to control the pore size and thickness. When the activated carbon coating solution is treated by a coating method, there has been a problem in that sufficient activated carbon cannot be attached to the nonwoven fabric.

In addition, in the case of a heat-sealed nonwoven fabric formed of only heat-adhesive fibers, there is a problem in that it is difficult to attach sufficient activated carbon because there is a limitation in increasing the porosity as a support having activated carbon by a wet coating method.

However, the deodorizing filter in which activated carbon is not sufficiently attached by the wet coating method has a problem that the deodorizing efficiency is significantly poor, and when the amount of activated carbon is increased, the function of the deodorizing filter is deteriorated by changing the pore structure in the nonwoven fabric or clogging the pores. There is.

Accordingly, it is urgent to research and develop an air purifier having excellent deodorizing performance by having a deodorizing filter capable of increasing the amount of deodorant attached so as to have remarkable deodorizing efficiency while fully performing the function as a deodorizing filter such as air permeation.

Unexamined Patent Publication No. 10-2011-0047371

An object of the present invention is to provide an air purifier having excellent deodorizing performance.

In addition, another object of the present invention is to provide a deodorizing filter for an air purifier that does not impede air permeation while remarkably improving the deodorizing performance of the air purifier.

In order to achieve the above technical problem, the present invention provides an inlet through which air is introduced, a deodorization filter for filtering the air introduced into the inlet, an outlet for discharging the air filtered through the deodorization filter, and a part of the outer surface. The inlet portion and the outlet portion are disposed, and provides an air purifier including a case for accommodating the deodorizing filter therein.

According to an embodiment of the present invention, the deodorizing filter is implemented by wet coating activated carbon through a binder on the inner and outer surfaces of the nonwoven fabric, and the nonwoven fabric has a fineness of 1.5 to 15 denier polyester support fibers and a fineness of 1.5 to It includes 15 denier polyester heat-adhesive fiber, and the support fiber may be fixed by heat-sealing with the heat-adhesive fiber.

In addition, the nonwoven fabric may have an air permeability of 150 to 550 ccs.

In addition, the heat-adhesive fibers and supporting fibers may be included in a weight ratio of 9:1 to 4:6.

In addition, the nonwoven fabric may have a basis weight of 20 to 140 g/m 2 and a thickness of 0.2 to 1.2 mm.

In addition, the nonwoven fabric may have an air permeability of 200 to 500 ccs.

In addition, the nonwoven fabric is formed by including a heat-adhesive fiber having a fineness of 6 to 15 denier and a support fiber having a fineness of 6 to 15 denier in a weight ratio of 8:2 to 5:5, and air permeability may be 300 to 500ccs.

In addition, the present invention is implemented by wet coating activated carbon through a binder on the inner and outer surfaces of the nonwoven fabric, and the nonwoven fabric is a polyester support fiber having a fineness of 1.5 to 15 denier and a polyester heat bonding fiber having a fineness of 1.5 to 15 denier. Including, the support fiber provides a deodorizing filter for an air cleaner fixed by heat fusion with the heat-adhesive fiber.

In addition, the present invention relates to a nonwoven fabric for a deodorizing filter implemented as a deodorizing filter by wet coating activated carbon through a binder on the inner and outer surfaces, wherein the nonwoven fabric has a fineness of 1.5 to 15 denier polyester support fibers and a fineness of 1.5 to 15 It provides a non-woven fabric for a deodorizing filter, comprising a denier polyester heat-adhesive fiber, wherein the support fiber is heat-sealed and fixed with the heat-adhesive fiber.

The air purifier of the present invention has a very excellent deodorizing effect, and the deodorizing filter provided for this can have a sufficient amount of activated carbon by remarkably increasing the amount of activated carbon attached to the nonwoven fabric when the activated carbon is coated as a deodorant. In addition, the nonwoven fabric according to the present invention that implements a deodorization filter is advantageous in significantly increasing the amount of activated carbon that plays a role of deodorization, and durability as it ensures shape retention, air permeation, and mechanical strength that can prevent damage due to the occurrence of differential pressure. It can be widely used as a deodorizing filter with excellent and deodorizing effect.

1 is a flowchart illustrating a process of manufacturing a heat-sealed nonwoven fabric provided in a deodorizing filter included in an embodiment of the present invention.
2 is a flowchart of a process of manufacturing a deodorizing filter included in an embodiment of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This embodiment is provided to more completely explain the description to those with average knowledge in the art. Detailed descriptions of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

The air purifier according to an embodiment of the present invention includes an inlet through which air is introduced, a deodorization filter that filters the air introduced into the inlet, an outlet through which the air filtered through the deodorization filter is discharged, and a part of the outer surface. The inlet portion and the outlet portion are disposed, and includes a case for accommodating the deodorizing filter therein.

The inlet portion performs a function of introducing air to be filtered, including dust and odors, into the interior of the enclosure of the air purifier, and may be formed on the outer surface of the enclosure. The inlet portion may be the same as the inlet portion provided in a conventional air purifier, and it may be appropriately modified according to the purpose, so a description thereof will be omitted in the present invention.

In addition, the deodorizing filter serves to remove odor components, dust, etc. contained in the air introduced into the inlet. The air filtered through the deodorization filter is discharged through a discharge part formed on a part of the outer surface of the enclosure. At this time, since the discharge unit may be the same as the discharge unit provided in a conventional air purifier, and it may be appropriately modified according to the purpose, a description thereof will be omitted in the present invention.

In addition, the enclosure may be a housing of a conventional air purifier as a housing having a receiving portion therein for accommodating components provided in a conventional air purifier such as a deodorizing filter. The size of the enclosure may be appropriately changed according to the area of the indoor space intended for air purification, and the present invention is not particularly limited thereto.

The deodorizing filter will be described in detail.

The deodorizing filter may be used without limitation if it is a type used for an air purifier, but is preferably implemented by wet-coating activated carbon through a binder on the inner and outer surfaces of the nonwoven fabric, and the nonwoven fabric has a fineness of 1.5 to 15 denier. It includes an ester support fiber and a polyester heat-adhesive fiber having a fineness of 1.5 to 15 denier, and the support fiber may be heat-sealed and fixed with the heat-adhesive fiber.

The non-woven fabric is a non-woven fabric for a deodorizing filter that has the main purpose of removing odors by adsorbing components that cause odors in the air through activated carbon, and attaching activated carbon rather than a filter medium filtering out particles having a predetermined particle size such as dust, Its main purpose is to use it as a supporting member to support it.

On the other hand, when activated carbon is attached to a nonwoven fabric through a wet coating method, there is a frequent problem of closing the pore structure of the nonwoven fabric, and a decrease in porosity due to this has a problem of reducing the air permeation amount. There is a problem that it is not easy to manufacture the nonwoven fabric itself so as to have air permeability, pore size, and thickness suitable for wet coating, which may cause a deodorization effect.

However, since the nonwoven fabric is formed by mixing support fibers of a specific fineness and heat-adhesive fibers of a specific fineness, the support fibers are fixed and formed through the heat-adhesive fibers, thus solving the above problems occurring when wet coating of activated carbon is carried out. . The nonwoven fabric implemented through this can significantly increase the content of activated carbon and have an internal structure suitable for the wet coating method, and at the same time retain shape-holding force as a support member.

1 is a view showing a configuration according to the manufacturing process of a heat-sealed nonwoven fabric provided in a deodorization filter included in an embodiment of the present invention, and FIG. 2 is a deodorization filter nonwoven fabric using a heat-sealed nonwoven fabric included in an embodiment of the present invention. It is a diagram showing the configuration according to the manufacturing process.

As shown in FIG. 1, in the manufacturing process 10 of a heat-sealed nonwoven fabric for a deodorizing filter according to the present invention, yarns forming a nonwoven fabric are supplied through a material supply unit 100, and each supplied from the material supply unit 100 is lumped together. Different types of yarns are mixed with each other by the material mixing unit 200, and the yarns are mixed by the material mixing unit 200 to separate each other by a hopper unit 300, and the hopper unit 300 The yarn separated by) is spread to a predetermined thickness by the carding unit 400 to form a thin film, and the single-layered nonwoven fabric layer supplied from the carding unit 400 is left and right by the wrapping unit 500 By moving and stacking a plurality of layers to form a nonwoven fabric layer of a predetermined thickness, the nonwoven fabric layer supplied from the wrapping unit 500 is stretched and transferred by the drafting unit 600, and in the drafting unit 600 The stretched and transferred nonwoven fabric layer is coupled with heat and pressure by the heat fusion coupling unit 700, and the nonwoven fabric joined by the heat fusion coupling unit 700 is wound up by a winding unit 800.

In addition, the material supply unit 100, the material mixing unit 200, the hopper unit 300, the carding unit 400, the wrapping unit 500, which are components of the heat-sealed nonwoven fabric manufacturing process 10 according to the present invention, The roles and functions of the heat fusion bonding unit 700 and the winding unit 800 are those that can adopt or appropriately modify a known configuration that can be used in the manufacture of non-woven fabrics, particularly the card-laid method, and thus a detailed description thereof will be omitted.

In this way, the card-laid nonwoven fabric can form a web by spreading the short fibers as a material thinly, and bonding each short fiber by a physical method of heat and pressure to make a heat-sealed nonwoven fabric. At this time, in order for the heat-sealed nonwoven fabric to effectively function as a nonwoven fabric for a deodorizing filter, it is necessary to be implemented as a heat-sealed nonwoven fabric having a structure in which the amount of the activated carbon coating solution is increased.

To this end, the present invention uses two kinds of yarns, specifically polyester support fibers and polyester heat-adhesive fibers, and is used for calendering in the heat-sealing bonding unit 700 for this purpose. A nonwoven fabric suitable for a deodorizing filter implemented by wet coating is implemented by heat-sealing the support fiber with the heat-adhesive fiber by heat fusion.

First, the polyester heat-adhesive fiber will be described.

The heat-adhesive fiber plays a role in bonding adjacent other heat-adhesive fibers and/or polyester support fibers when heat and pressure are applied. The heat-adhesive fiber may be a known fiber called a low melting point yarn (or a low melting point fiber) or a low melting point yarn (LM), a non-melting point yarn (or a melting point fiber) having a softening point and no melting point. The heat-adhesive fiber may be employed as a material without limitation if it is a polyester-based component among heat-adhesive components employed in fibers known for this purpose.

The heat-adhesive component provided in the heat-adhesive fiber is manufactured to lower the melting point by modifying any one or more of polyhydric carboxylic acid and diol constituting the polyester, or to remove the melting point and have only a softening point.For example, the melting point is 100 ~ It may be 180°C, or a component having no melting point and a softening point of 100 to 150°C. For example, the heat-adhesive component may be modified by replacing part of terephthalic acid with isophthalic acid as an aromatic component of the polyvalent carboxylic acid, and/or replacing part of terephthalic acid with an aliphatic polyvalent carboxylic acid such as adipic acid. In addition, a part of ethylene glycol as a diol is used as an aliphatic diol, such as 1,4-butanediol, 1,6-hexanediol, 2,2-dimethyl-1,3-propanediol, 3-methyl-1,5- It may be modified by substitution with an aliphatic diol having a side chain such as pentanediol, but is not limited thereto.

The heat-adhesive fiber may be a fiber formed only of the heat-adhesive component described above, or a fiber formed such that the heat-adhesive component is exposed to the fiber surface. However, in the fiber formed only of the above-described thermal bonding component, the thickness of the final nonwoven fabric is easily implemented very thin by the heat and pressure applied from the above-described thermal bonding unit 700, making it difficult to achieve the desired thickness and small pore diameter. In addition, the air permeability is also remarkably small, so it may not be suitable for the use of a deodorizing filter manufactured by wet coating. Accordingly, preferably, the heat-adhesive fiber may be a sheath-core type fiber or a side-by-side type fiber having a cross-sectional structure. In this case, in the sheath-core fiber, a heat-adhesive component may form a sheath portion, and a component having a higher melting point than the heat-adhesive component, for example, polyethylene terephthalate may form the core portion. In addition, in the case of a side-by-side type fiber, the heat-adhesive component may form one side, and a component having a higher melting point than the heat-adhesive component, for example, PET may form the other.

However, when considering the thickness, shape stability, and wet coating suitability of activated carbon of the nonwoven fabric to be produced, sheath-core fibers may be more preferable. More preferably, the sheath-core fiber may have a sheath portion and a core portion formed at a weight ratio of 6:4 to 4.5:5.5, thereby providing thickness realization of the desired nonwoven fabric, shape stability, and suitability for wet coating of activated carbon. There is an advantage that can be further improved.

Next, the polyester support fiber serves to maintain the thickness in the nonwoven fabric and increase the pore diameter, porosity and air permeability to a desired level. The polyester supporting fiber has a melting point greater than that of the above-described heat-adhesive fiber, and preferably, a polyester fiber having a melting point higher than that which is not melted by heat and pressure applied from the bonding portion may be used without limitation. As a non-limiting example of this, the polyester support fiber may be a polyethylene terephthalate fiber.

The nonwoven fabric according to an embodiment of the present invention manufactured through the above two types of fibers may have a permeability of 150 to 550 ccs (cm 3 / ㎠ / sec), more preferably 200 to 500 ccs, more preferably 300 It can be ~ 500ccs. In order to manufacture a heat-sealed nonwoven fabric so that the coating solution containing activated carbon has a structure that is easily permeable, the air permeability of the heat-sealed nonwoven fabric manufactured by controlling the composition ratio and fineness of the polyester heat-adhesive fiber and the polyester support fiber is 150. When ~ 550ccs is satisfied, the adhesion amount of the activated carbon coating solution is significantly increased, and the air before deodorization and the air after deodorization can smoothly pass through the nonwoven fabric by preventing pore clogging even after adhesion, and the occurrence of differential pressure decreases to further improve durability. It may be advantageous to achieve the object of the present invention, such as. If the air permeability is less than 150 ccs, the area through which the activated carbon coating solution can penetrate is not sufficient, and the activated carbon is located only on a part of the nonwoven fabric, especially the surface, and not inside the nonwoven fabric, so that the deodorizing performance may be greatly reduced. In addition, if the air permeability exceeds 550ccs, the area through which the activated carbon can penetrate increases, but the strength of the nonwoven fabric decreases, causing a problem in functioning as a support.

On the other hand, even when designed to have the above air permeability, the polyester heat-adhesive fiber has a fineness of 1.5 to 15d (denier), more preferably 6 to 15d, and the polyester support fiber has a fineness of 1.5 to 15d, More preferably, it is good to use those having a fineness of 6 to 15d. When two kinds of fibers satisfying this fineness range are mixed, it may be advantageous to achieve a desired level of morphological stability, thickness level, pore diameter, porosity, and air permeability. If at least one of the two fibers has a fiber fineness of less than 1.5d, it may be difficult to achieve the desired physical properties of the present invention, such as a structure in which it is difficult for the coating solution including activated carbon to penetrate because the air permeability is too small. In addition, if any one or more of the two fibers exceeds 15d, the air permeability increases, but the specific surface area of the fibers attached to the activated carbon is too small, and the content of the attached activated carbon decreases. Properties can be difficult to achieve.

In addition, the two kinds of fibers may each independently have a fiber length of 38 to 64 mm, which may be more advantageous in achieving the object of the present invention.

In addition, even when the above-described air permeability is satisfied, the present invention may be more advantageous in achieving the desired effect when the mixing ratio of the polyester heat-adhesive fiber and the polyester support fiber is satisfied. Preferably, the mixing ratio of the polyester heat-adhesive fiber and the polyester supporting fiber is a weight ratio of 9:1 to 4:6, more preferably a weight ratio of 8:2 to 5:5, even more preferably 8:2 to In the case of a weight ratio of 6:4, it may be advantageous to manufacture a nonwoven fabric with a structure in which the activated carbon coating solution is more easily penetrated. If the weight of the heat-adhesive fiber exceeds 9 times the weight of the supporting fiber, the heat-sealing portion in the non-woven fabric is excessively increased, resulting in a smaller thickness and less air permeability, resulting in a non-woven fabric having a structure that is difficult to penetrate the activated carbon coating solution. Can be. In addition, there is a concern that the pores of the nonwoven fabric are blocked due to the coating solution introduced into this structure, preventing the penetration of air to be deodorized, or damage to the nonwoven fabric due to the occurrence of differential pressure, and remarkably deteriorating durability. If the weight of the heat-adhesive fiber is less than 1.5 times that of the support fiber, the ratio of the heat-sealing bonded portion is significantly reduced, resulting in a problem of poor shape stability of the nonwoven fabric and a decrease in durability due to a decrease in strength.

In addition, according to an embodiment of the present invention, the nonwoven fabric manufactured may have a basis weight of 20 to 140 g/m 2, more preferably 30 to 120 g/m 2, and even more preferably 50 to 90 g/m 2. If the basis weight is less than 20g/m2, the thickness is thin and the strength is significantly reduced, resulting in poor shape stability and durability. In addition, if the basis weight exceeds 140g/m2, the pores may become smaller and the area to penetrate the activated carbon may be reduced, and the coating layer of the activated carbon may be formed only in some areas, or the pores may be blocked to make air permeation difficult. have.

In addition, the heat-sealed nonwoven fabric according to an embodiment of the present invention may have a thickness of 0.2 to 1.2 mm, more preferably 0.3 to 1.0 mm. If the thickness is less than 0.2 mm, the air permeability decreases due to heat fusion and compression, and there is a risk of pore clogging during coating, and the penetration of the coating solution is significantly reduced, so that an activated carbon coating layer may be formed only in some areas. If the thickness exceeds 1.2mm, problems such as poor shape stability and poor durability of the nonwoven fabric may occur.

Referring to FIG. 2 for the manufacturing process 20 of the deodorizing filter using the thermally fusible nonwoven fabric of the present invention, the thermally fusible nonwoven manufacturing step 210, the activated carbon coating solution processing step 220, and the nonwoven fabric treated with the coating solution Through the drying step 230, a deodorizing filter may be manufactured.

Since the heat-sealing nonwoven fabric manufacturing step is the same as the above description, a detailed description will be omitted.

The activated carbon coating solution treatment step 220 is a step of treating the activated carbon coating solution on the heat-sealed nonwoven fabric prepared using the activated carbon coating solution.

The activated carbon coating solution is a step of preparing a solution containing activated carbon as a deodorant, and the activated carbon may be used without limitation in the case of commercially available activated carbon.

In addition to the activated carbon, the coating solution may further include a binder component capable of fixing the activated carbon to the surface of the support fiber or the heat-adhesive fiber, and a solvent capable of dissolving it. The binder component may be used without limitation in the case of a known binder component employed in a coating solution used in a deodorizing filter manufactured by wet coating activated carbon.

In addition, the solvent may be a known solvent suitable for dissolving the binder component, and may be water or an organic solvent.

Meanwhile, the coating solution may further contain a curing agent when the binder is a curable component. In addition, the coating solution may further include known additives such as a flame retardant, a leveling agent, a pH adjusting agent, a dispersing agent, and an antifoaming agent as other additives.

For example, the coating solution may contain 8 to 15% by weight of activated carbon, the binder may contain 0.5 to 2% by weight, and the remaining amount may contain a solvent, and through this composition, the above-described heat-sealed nonwoven fabric can be more easily coated and , As it is suitable for passing through the flow path inside the nonwoven fabric, it may be suitable for fixing the activated carbon evenly inside and outside.

In addition, the treatment may be used without limitation in the case of a general method of treating a solution on a nonwoven fabric, and the method may employ a known coating method, and as an example, a method such as dip coating or comma coater may be used, but is limited thereto. It does not become.

Thereafter, a step 230 of drying the nonwoven fabric treated with the coating solution is performed in order to fix the activated carbon in the treated coating solution to the nonwoven fabric. The drying may be performed by applying a predetermined heat, and the drying time and drying temperature may be appropriately changed according to the type of a specific binder selected and the content of the solvent, so the present invention is not particularly limited thereto.

Hereinafter, the present invention will be described in detail by examples.

However, the following examples are merely illustrative of the present invention, and the contents of the present invention are not limited by the following examples.

<Example 1>

An embodiment of the present invention will be described in more detail as follows. H's LM (Low Melting) yarn as a polyester heat-adhesive fiber and PET yarn as a polyester support fiber were mixed at a weight ratio of 75:25 to prepare a heat-sealed nonwoven fabric having a basis weight of 60 g/m 2. Specifically, the polyester heat-adhesive fiber is a short fiber having a fineness of 6d (denier) and a fiber length of 51 mm, and a sheath-core fiber having a weight ratio of 5:5 to the sheath part made of the heat-adhesive component and the core part made of PET is used. did. In addition, as a polyester supporting fiber, a short fiber having a fineness of 6d and a fiber length of 51 mm was used as a general PET fiber of H company. In this way, the material supply part, the material mixing part, the hopper part, the carding part, the wrapping part, the drafting part, which are the non-woven fabric manufacturing processes described above, using the single fiber of the heat-sealed polyester fiber and the general polyester fiber in a weight ratio of 75:25. , A non-woven fabric was manufactured while passing through the coupling part and the winding part in order. At this time, the bonding portion adopted a bonding method by heat of 170° C. by calendering and a pressure of 4 kg/㎠ to prepare a nonwoven fabric as shown in Table 1 below.

<Examples 2 to 12, Comparative Examples 1 to 4>

Prepared by carrying out the same manner as in Example 1, but by changing the mixing ratio of the polyester heat-adhesive fiber and the polyester supporting fiber, fineness, thickness, and basis weight of the prepared nonwoven fabric as shown in Table 1 below, a nonwoven fabric as shown in Table 1 Was prepared.

<Experimental Example 1>

The following physical properties were evaluated for the nonwoven fabrics manufactured through Examples and Comparative Examples and shown in Table 1 below.

1. Basis weight

The basis weight of the prepared heat-sealed nonwoven fabric was measured with a general weight scale. A 2,000mm-wide nonwoven fabric is cut into 50×50cm sizes at three points, including the center and the middle of the left and right, and the weight is measured to obtain an average value, and converted into weight per 1㎡ (g) /㎡) is indicated.

2. Thickness

The thickness of the prepared heat-sealed nonwoven fabric was measured with a fudo gauge (MODEL H, PEACOCK, Japan). The average value was obtained by measuring the thickness of a 2,000 mm wide nonwoven fabric at a total of three points, including the center and the middle of the left and right.

3. Air permeability

The air permeability of the prepared heat-sealed nonwoven fabric was measured with an air permeability meter (MODEL FX-3300, TEXTEST). The average value was obtained by measuring the air permeability of a 2,000 mm wide nonwoven fabric at a total of three points, including the left and right middle positions based on the center and the center. The measurement pressure was measured at 125Pa, and expressed in ccs (cm 3 /cm 2 /sec).

4. Activated carbon adhesion amount

The activated carbon coating solution prepared as follows was impregnated with a nonwoven fabric and then dried while passing through a dryer to prepare a deodorizing filter.

The activated carbon coating solution was used as an activated carbon coating solution by adding 94 kg of water to 40 kg of activated carbon solution (36% by weight of activated carbon, 4% by weight of binder, residual water) of 40% solid content of K company, followed by stirring.

In the prepared deodorizing filter, the amount of activated carbon attached was calculated by the following equation.

[expression]

Activated carbon adhesion amount (%) = (B-A)×100/B

Here, A is the weight (g) of the heat-sealed nonwoven fabric before activated carbon treatment, and B is the weight (g) of the heat-sealed nonwoven fabric after treatment with activated carbon.

It can be evaluated that the greater the amount of activated carbon attached, the better the deodorizing effect. Therefore, when the air permeability is 150-550ccs and the amount of activated carbon is 20% or more, it is evaluated as good (○), and in other cases, including the case where the amount of activated carbon is less than 20%, it is evaluated as poor (×).

5. Shape stability

Five experts applied external force to the manufactured nonwoven fabric by hand irregularly and observed it with the naked eye to evaluate the shape stability compared to before applying the external force. Specifically, the criteria were evaluated as good 3 points, normal 2 points, and poor 1 point, and the evaluation results of 5 experts were summed and averaged. 3 ~ 　 above 2.5 is good (○), and below 2.5 ~ above 1.5 is normal (Δ) , 1.5 or less was expressed as a defect (×).

6. Air flow inhibition index

After the activated carbon was attached, the air permeability was re-measured for the deodorizing filter in the same manner as the method evaluated above, and the air permeability reduction rate was measured through the following equation.

[expression]

Air permeability reduction rate (%) = [Non-woven fabric air permeability (ccs)-Deodorization filter air permeability (ccs)]×100 / Non-woven fabric air permeability (ccs)

Thereafter, the air flow rate inhibition index was calculated according to the following equation using the calculated air permeability reduction rate (%) and the activated carbon adhesion amount (%) calculated by the above-described method. The larger the air flow rate inhibition index, the more the flow path through the nonwoven fabric is excessively narrowed or blocked compared to the amount of activated carbon attached from the deodorization filter, and the nonwoven fabric is not good for use as a deodorant filter manufactured by wet coating method. do.

[expression]

Air flow inhibition index = Air permeability reduction rate (%) / Activated carbon adhesion amount (%)

division Polyester
Heat-adhesive fiber Polyester
Supporting fiber Heat-sealed nonwoven fabric Activated carbon
Adhesion amount
(%) Deodorant
filter
Ventilation
(ccs) mask
Drunk
Hyo
and shape
stability air
flux
Inhibition
Indices Fineness
(d) mix
ratio(%) Fineness
(d) mix
ratio(%) thickness
(Mm) Basis weight
(g/㎠) Ventilation
(ccs) Example 1 6 75 6 25 0.45 60 380 28 250 ○ ○ 1.22 Example 2 6 50 6 50 0.52 60 420 31 280 ○ ○ 1.08 Example 3 6 42 6 58 0.56 60 450 33 290 ○ △ 1.08 Example 4 6 88 6 12 0.36 60 330 23 190 ○ ○ 1.84 Example 5 2 75 6 25 0.32 60 270 24 160 ○ ○ 1.72 Example 6 15 75 6 25 0.63 60 480 32 300 ○ ○ 1.17 Example 7 6 75 2 25 0.30 60 250 26 150 ○ ○ 1.54 Example 8 6 75 6 25 0.29 50 300 27 210 ○ ○ 1.11 Example 9 6 75 6 25 0.47 90 310 24 220 ○ ○ 1.21 Example 10 6 75 6 25 0.33 60 310 25 200 ○ ○ 1.42 Example 11 6 35 6 65 0.61 60 490 30 270 ○ × 1.36 Example 12 6 95 6 5 0.27 60 250 17 160 × ○ 2.12 Example 13 6 75 15 25 0.49 60 490 27 330 ○ ○ 1.21 Comparative Example 1 2 100 - - 0.23 60 130 13 90 × ○ 2.37 Comparative Example 2 17 75 6 25 0.68 60 540 28 310 ○ × 1.52 Comparative Example 3 6 75 17 25 0.51 60 510 27 290 ○ △ 1.60 Comparative Example 4 4 75 6 25 0.41 60 280 24 160 ○ ○ 1.79 Comparative Example 5 6 75 4 25 0.43 60 320 25 180 ○ ○ 1.75

As can be seen in Table 1,

In the case of Comparative Example 1, which is a nonwoven fabric formed only of heat-adhesive fibers, it can be seen that the amount of activated carbon adhesion is significantly poor compared to the examples.

In addition, even when the heat-adhesive fiber and the supporting fiber are mixed, in the case of Example 11, which is not satisfied with the preferred range of the present invention, thermal bonding was not sufficiently performed due to the small ratio of the heat-adhesive fiber, and the shape stability was significantly reduced due to the decrease in strength Can be confirmed.

In addition, in the case of Example 12 having a large heat-adhesive fiber ratio, it can be confirmed that the deodorizing effect is not good as the amount of activated carbon attached is small, and the air flow rate inhibition index is also high.

<Experimental Example 2>

The morphological stability of Example 2, Example 3, Example 11, Example 13, Comparative Example 2 and Comparative Example 3 was evaluated by the following evaluation method, and the results are shown in Table 2 below.

Specifically, the tensile strength in the MD direction was measured according to KS K ISO 9073-3. The clamping interval of the tensile strength tester was set to 200 mm, and both ends of the specimen in the MD direction were held between them. The test piece was straightened so that the load was located at the zero point of the graph, and the test piece was stretched at a constant speed of 100 mm/min. After recording the load-extension curve for each test piece, the maximum cutting strength was measured in units of kg/5 cm. It can be seen that the smaller the tensile strength in the MD direction, the worse the shape stability.

division Polyester heat-adhesive fiber Polyester support fiber shape
stability Tensile strength in MD direction
(kg/5㎝) Fineness (d) Mixing ratio (%) Fineness (d) Mixing ratio (%) Example 2 6 50 6 50 ○ 7.4 Example 3 6 42 6 58 △ 5.1 Example 11 6 35 6 65 × 3.8 Additional Example 13 6 75 15 25 ○ 7.2 Additional Comparative Example 2 17 75 6 25 × 4.5 Additional Comparative Example 3 6 75 17 25 △ 5.9

As can be seen in Table 2 above, when comparing Examples 2 and 3 based on 40% of the ratio of thermally fused fibers, which is the lower limit of the preferred range of the mixing ratio of two types of fibers, the tensile strength in the MD direction was compared to Example 3 In Example 2, it can be seen that the tensile strength is increased by about 45%, and it can be seen that it is very excellent in shape stability.

In addition, in the case of the additional Comparative Example 2 and Additional Comparative Example 3, which exceeded 15 denier in the fineness of the fiber, it was confirmed that the tensile strength in the MD direction was significantly smaller than that of Additional Example 13. The remarkable strength according to the range of fineness You can see that there is a difference.

Claims (8)

An inlet through which air is introduced;
A deodorizing filter for filtering air introduced into the inlet;
A discharge unit for discharging the air filtered through the deodorization filter; And
An air purifier comprising a; an enclosure having the inlet portion and the outlet portion disposed on a part of the outer surface and receiving the deodorization filter therein. The method of claim 1,
The deodorization filter is implemented by wet coating activated carbon through a binder on the inner and outer surfaces of the nonwoven fabric, and the nonwoven fabric includes polyester support fibers having a fineness of 1.5 to 15 denier and polyester heat-adhesive fibers having a fineness of 1.5 to 15 denier. Including, wherein the support fiber is fixed by heat fusion with the heat-adhesive fiber. The method of claim 2,
The heat-adhesive fiber and the support fiber are air purifiers, characterized in that included in a weight ratio of 9:1 ~ 4:6. The method of claim 2,
The nonwoven fabric has a basis weight of 20 to 140 g/m 2 and a thickness of 0.2 to 1.2 mm. The method of claim 2,
The air purifier, characterized in that the air permeability of the non-woven fabric is 150 ~ 550ccs. The method of claim 2,
Heat-adhesive fibers with a fineness of 6 to 15 denier and a support fiber with a fineness of 6 to 15 denier are formed in a weight ratio of 8:2 to 5:5,
A method of manufacturing a nonwoven fabric for a deodorizing filter, characterized in that the air permeability of the prepared nonwoven fabric is 300 ~ 500ccs. It is implemented by wet coating activated carbon through a binder on the inner and outer surfaces of the nonwoven fabric, and the nonwoven fabric includes a polyester support fiber having a fineness of 1.5 to 15 denier and a polyester heat-adhesive fiber having a fineness of 1.5 to 15 denier, The supporting fiber is a deodorizing filter for an air purifier fixed by heat fusion with the heat bonding fiber. In the nonwoven fabric for a deodorization filter implemented as a deodorization filter by wet coating activated carbon on the inner and outer surfaces through a binder, the nonwoven fabric is a polyester supporting fiber having a fineness of 1.5 to 15 denier and a polyester heat having a fineness of 1.5 to 15 denier. A nonwoven fabric for a deodorizing filter comprising an adhesive fiber, wherein the support fiber is heat-sealed and fixed with the heat-adhesive fiber.

Images