KR20190023254A - Filter for water purifier and method for making the filter media - Google Patents

Abstract

The present invention relates to a filter suitable for use as a main filter of a direct-supply type water purifier, and a method for manufacturing the same. The filter of the present invention comprises: a microorganism removing layer for removing microorganisms in water; a turbidity removing layer positioned at one surface or both surfaces of the microorganism removing layer to remove a particulate material in water; and a support layer positioned on both surfaces of an outermost layer of a filter. According to the present invention, a water purifying filter which has the microorganism removing layer, the turbidity removing layer, and the support layer to be bonded and integrated, and is to remove a particulate material having a shape bent in a Zigzag manner to be corrugated, is provided. The method of the present invention comprises the steps of: placing a microorganism removing material for removing microorganisms in water and a turbidity removing material for removing a particulate material in water, on one surface or both surfaces of the microorganism removing material, placing a support material on both surfaces of the outermost layer of the filter, and manufacturing a composite material by predeterminately sequentially or temporarily bonding and integrating the microorganism removing material, the turbidity removing material, and the support material; and bending the integrated composite material in a Zigzag manner to be formed in a corrugated shape.

Description

Technical Field [0001] The present invention relates to a material for a main filter of a water purifier and a method of manufacturing the filter. [0002]

The present invention relates to a filter suitable for use as a main filter of a water purifier and a method of manufacturing the filter.

Typically, the water purifier is composed of a pre-carbon filter, a main filter, and a post-carbon filter. The free carbon filter serves to remove harmful chemicals such as carcinogens (THM), synthetic detergents, insecticides, and residual chlorine by using the adsorption method of activated carbon, and the post-carbon filter removes water And removes the unpleasant taste, odor, and pigment contained in the product. That is, both the pre-carbon filter and the post-carbon filter serve to remove the chemical.

In addition, the main filter has a role of removing particulate matter, and some filters remove viruses and bacteria.

Generally, the main filter used in direct water type water purifiers in Korea is a positive charge filter which is capable of removing bacteria and virus, and a hollow fiber membrane (UF) having no virus removal capability is also used.

The UF filter generally has some ability to remove bacteria, but it does not have virus removal capability. In addition, the pore size of the positive charge filter is about 0.2 to 2.0 탆, . When a material having a single pore is used as described above, the pore of the filter tends to be clogged in the early stage when purifying high turbidity water.

In addition, such a water purifier causes a problem that the post-carbon filter or the like is easily contaminated with bacteria and re-propagated when microorganisms are present in the raw water. Bacteria are introduced into the storage tank by the contaminated post-carbon filter, so that the microorganisms are re-proliferated in the storage tank. In addition, bacteria and microorganisms may infiltrate into the water stored in the storage tank and propagate from outside, and water may be generated on the inner wall of the storage tank.

Therefore, it is necessary to further improve the performance of the main filter for removing particulate matter including microorganisms.

The present invention provides a filter suitable for use as a main filter of a water purifier and a method of manufacturing the filter.

According to an embodiment of the present invention, there is provided a water filter for removing particulate matter in water, the water filter comprising: a microbial removal layer for removing microorganisms in the water; A pretreatment layer disposed on one side or both sides of the microbial removal layer and removing particulate matter in the water; And a support layer positioned on both sides of the outermost layer of the filter, wherein the microbial removal layer, the pretreatment layer, and the support layer are joined and integrated, and are zigzag bent and corrugated.

In another embodiment, the water filter comprises a support layer / a primary detachment layer / a microorganism removal layer / a secondary detachment layer / support layer, a support layer / a primary detachment layer / a microorganism removal Layer / support layer, or a layer structure of a support layer / microorganism removal layer / secondary preparation layer / support layer.

In another embodiment, the microbial removal layer may be a positive charge material coated or chemically bonded to the nonwoven substrate.

In another embodiment, the nonwoven fabric of the microbial removal layer may be made of at least one fiber selected from the group consisting of glass fiber, cellulose fiber, polypropylene fiber, polysulfone fiber and polyester fiber.

In another embodiment, the positive charge material is selected from the group consisting of boehmite, poly Diallyl dimethyl ammonium chloride, melamine formaldehyde / colloidal silica, and cross-linked polyethyleneimine Lt; / RTI >

In another embodiment, the nonwoven fabric of the microbial removal layer may have a unit weight of 0.5 g / m 2 to 300 g / m 2 and a pore size of 0.2 μm to 20 μm.

In another embodiment, the microbial removal layer may be made of a material in which boehmite is complexed with a nonwoven fabric of PET fibers.

In another embodiment, the nonwoven fabric material may be used as the pretreatment layer.

In another embodiment, the pretreatment layer may be a nonwoven fabric of at least one fiber selected from the group consisting of polypropylene, PET, polyethylene, polyamide and cellulose.

In another embodiment, the pretreatment layer may be a nonwoven fabric having a unit weight of 15-90 g / m 2 and a pore size of 5-100 탆.

In another embodiment, the first tablet layer is a nonwoven fabric having a unit weight of 20 to 50 g / m < 2 > and a pore size of 15 to 30 m, and the second tablet layer is a nonwoven fabric having a unit weight of 10 to 40 g / Wherein the nonwoven fabric of the first tablet layer and the nonwoven fabric of the second tablet layer are different in at least one of the unit weight and the pore size and the nonwoven fabric of the second tablet layer is larger in unit weight than the nonwoven fabric of the first tablet layer, The size may be smaller.

In another embodiment, the support layer may be a nonwoven fabric of at least one fiber selected from the group consisting of polypropylene, PET, polyethylene, polyamide and cellulose.

In another embodiment, the support layer may be a nonwoven fabric having a basis weight of 15 to 90 g / m 2 and a pore size of 50 to 150 탆.

In another embodiment, the microbial removal layer, pretreatment layer and support layer are joined together by at least one method selected from the group consisting of hot melt spray bonding, ultrasonic sealing, heat sealing, thermal bonding, chemical bonding and gravure bonding .

In another embodiment, the microbial removal layer, the pretreatment layer and the support layer may be bonded by hot melt spraying of EVA or a propylene binder.

According to an embodiment of the present invention, there is provided a method for manufacturing a water filter, including: a microbial removal material for removing microorganisms in water; a material for removing particulate matter in the water; Is placed on one side or both sides of the microorganism removing material, and the supporting material is placed on both sides of the outermost layer of the filter, and the microbial removing material, the cloth material and the supporting material are bonded in a predetermined order or at a time, And zigzagging the integrated composite material to form a corrugated shape.

In another embodiment, the bonding may be performed by at least one method selected from the group consisting of hot melt spray bonding, ultrasonic sealing, heat sealing, thermal bonding, chemical bonding and gravure bonding.

In another embodiment, the bonding may be performed by hot melt spray bonding using EVA, propylene as a binder.

Further, the present invention provides a direct water type purifier including a pre-carbon filter, a water filter of any one of the above embodiments, and a post-carbon filter.

By using the filter of the present invention as a main filter of a water purifier, it is possible to efficiently remove particulate matter including microorganisms present in the water to be treated while providing a sufficient flow rate of the purified water, and furthermore, It is possible to provide a filter material capable of prolonging the ability to maintain the flow rate constant.

Fig. 1 (a) is a cross-sectional view of a water filter according to the present invention, and Fig. 1 (b) shows a layer structure of the filter.
Fig. 2 shows the results of the evaluation of the tacking performance of the filter of Example 1 and Comparative Example 1 (film area 0.041 m 2).
3 is a diagram showing the results of the flow rate holding force evaluation for the filters of Example 1 and Comparative Example 1. Fig.
Fig. 4 shows the results of the evaluation of the tacking performance of the filter of Example 2 and Comparative Example 2 (membrane area: 0.047 m 2).
FIG. 5 is a photograph of the surface state of each layer constituting the particulate matter removal mechanism and the post-purification filter of the filter of the present invention.

The present invention provides a main water filter of a water purifier. Hereinafter, the present invention will be described in detail with reference to the drawings.

The water filter provided in the present invention includes a microbial removal layer, a pretreatment layer and a support layer. An example of the structure of the water filter of the present invention is schematically shown in Fig. Fig. 1 schematically shows a cross-sectional view (a) of the water filter of the present invention and a layer structure (b) of the water filter.

As shown in Fig. 1 (b), the water filter of the present invention may have a layer structure of the support layer-first order tacky layer-microbial removal layer-second order tacky-support layer, and as another example, A layer structure of a tacky layer - a microorganism removing layer - a supporting layer, or a layer structure of a supporting layer - a microbial removing layer - a primary tacking layer - a supporting layer. Preferably, the support layer is composed of a primary layer, a primary layer, a microbial removal layer, a secondary layer, and a support layer.

The support layer serves to protect the microbial removal layer and the respective tacky layers when the filter of the present invention is manufactured, and is disposed on both sides of the filter provided by the present invention. The support layer substantially does not have the ability to remove particulate matter.

The support layer material may be a nonwoven fabric. The nonwoven fabric may be natural or synthetic fiber. For example, natural materials such as synthetic polymers such as PP, PET, PE, and PA and cellulose may be used alone or in combination And is not particularly limited. However, a PP spunbonded nonwoven fabric may preferably be used.

It is preferable that no chemicals are used in the production of the nonwoven fabric which is the material of the support layer. If a chemical is used, the remaining chemical can be released into the water during the purification process, which can contaminate the water quality.

The material of the support layer is not required to remove the particulate matter in the water, and it can protect the inside deposit layer and the microbial removal layer. Therefore, the pore size, the unit weight, and the like are not particularly limited. For example, the material of the support layer may have a pore size of 50 to 150 mu m and a unit weight of 15 to 90 g / m < 2 >. More preferably, the nonwoven fabric as a material of the supporting layer has a unit weight of 15 to 50 g / m 2 and a pore size of 70 to 120 탆.

Furthermore, the non-woven fabric of the support layer material may be fibers having a diameter of 15 to 100 mu m, more preferably 20 to 50 mu m.

The pretreatment layer used in the filter of the present invention is located on the inner surface of the support layer and serves to remove particulate matter having a large particle size contained in the raw water. It is possible to reduce the burden of removing the particulate matter in the microorganism removing layer by first removing the particulate matter having a large size by the pretreatment layer, thereby enabling the constant flow rate to be maintained for a longer period of time.

The non-woven fabric may be used as a material for the surface of the tablet. As the nonwoven fabric, synthetic polymers such as polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polyamide (PA), and fibers made of natural materials such as cellulose may be used. As a matter of course, they can be used in combination. Of these, it is preferable to use a polypropylene meltblown nonwoven fabric.

It is preferable that the nonwoven fabric does not contain a chemical agent when the nonwoven fabric is produced. The chemicals contained in the nonwoven fabric may be eluted in water to lower the water quality.

As described above, the pretreatment layer may be located on both sides of the microorganism removing layer, and may be formed on the front surface (primary tacking layer) or the rear surface A second secondary deposit). Particularly, since the primary pretreatment layer serves to remove large particulate matter in the raw water, it is possible to reduce the burden of removing particulate matter in the microorganism removal layer, and it is more preferable to include at least the primary retreatment layer.

For example, the unit weight of the raw material is 15 to 90 g / m < 2 > and the pore size of the nonwoven fabric is 5 to 100 mu m . If the pore size of the nonwoven fabric is smaller than the above range, there is a problem of increasing water treatment burden on the first pretreatment layer. If the pore size is larger than the above range, the removal effect of particulate matter by the first retanning layer is decreased Thereby causing a burden on the microbial removal layer. On the other hand, when the unit weight is less than the above range, the effect of removing particulate matter from the internal end product is small. If the unit weight exceeds the above range, the unit weight may act as a resistance due to an excessively high density, resulting in a decrease in flow rate. More preferably, the surface material of the primary tacking layer has a unit weight of 20-50 g / m 2, and the pore size of the nonwoven fabric may be 15-30 탆.

On the other hand, the fiber material of the primary tablet layer may have a diameter in the range of 3 to 50 mu m, and more preferably, the fiber diameter may be in the range of 3 to 15 mu m.

The filter of the present invention may include a secondary pretreatment layer on the outflow side of the microorganism removal layer. The secondary tacky layer functions to prevent the particulate matter collected from being leaked to the outside of the filter even under unusual conditions in which high pressure is instantaneously applied.

Therefore, it is preferable that the material of the surface of the secondary side layer has a higher tacking performance than the primary tacky layer. Therefore, it is necessary that at least one of the unit weight and the pore size of the nonwoven fabric as the second stocking material is different from that of the first stocking material, so that the particulate matter removing performance needs to be more excellent. More specifically, It is preferable that the material is larger in unit weight or smaller in pore size than the material of the first tank layer.

The toners of the secondary tacky layer may have a unit weight of less than 15 to 90 g / m < 2 > and a pore size of the nonwoven fabric of less than 5 to less than 100 mu m. The second tentative layer may more preferably have a unit weight of 10-40 g / m 2 and a pore size of 15-30 탆.

On the other hand, the material of the primary tacking layer may be a fiber having a diameter of 3 to 50 mu m, more preferably a fiber having a diameter of 3 to 15 mu m. The smaller the pore size of the nonwoven fabric, which is the material of the secondary tacky layer, is preferable from the viewpoint of preventing the outflow of the particulate matter, but the resistance may be generated and the flow rate may be reduced. Therefore, it is preferable to have a pore size in the above range.

On the other hand, the filter of the present invention includes a microbial removal layer on the inlet side of the primary tear layer and an inlet side of the secondary tear layer. The microbial removal layer removes the particulate matter that has not been removed from the tablet, but also removes microorganisms present in the raw water.

A nonwoven fabric may be used as the microorganism removing material. When the nonwoven fabric is used, particulate matter can be removed from the surface of the nonwoven fabric as well as the inside of the nonwoven fabric as described above, which is more effective in removing particulate matter.

Conventionally, a UF material has been used as a main filter of a water purifier. However, in this case, the particulate matter is removed only from the surface of the UF material, so that the pores are easily closed. However, when the nonwoven fabric is used as the material of the pretreatment layer as in the present invention, the particulate matter can be removed from the surface of the material as well as the material, and the flow rate reduction due to the removal of particulate matter Can be significantly reduced.

The nonwoven fabric to be used as the microorganism removing material is not particularly limited and may be suitably used in the present invention as long as it is a nonwoven fabric used as a filter material of a water purifier. Examples of the nonwoven fabric include glass fiber, cellulose, polypropylene, polyester, A nonwoven fabric using fibers such as rhenitrile (PAN), polyvinylidene fluoride (PVDF), polystyrene (PS), polysulfone and the like. They may be used singly or in combination of two or more. Preferably, a nonwoven fabric material made of PET fibers can be used.

The nonwoven fabric as the microbial removal material may have a unit weight of 0.5 g / m 2 to 300 g / m 2 and a pore size of 0.2 m to 20 m, more preferably 1 to 3,000 g / m 2, Lt; RTI ID = 0.0 > m. ≪ / RTI >

The nonwoven fabric as the microorganism removing material may have a fiber diameter of 0.02 탆 to 100 탆, more preferably 0.2 to 50 탆.

The microbial removal layer is intended to remove bacteria, viruses and fine particles present in the raw water. For this purpose, the microbial removal layer may be physically bonded or chemically bonded to the positive charge material in order to remove microorganisms mainly negatively charged to the nonwoven fabric.

The positive charge material is not particularly limited and may be suitably used in the present invention as long as it is ordinarily used for removing microorganisms. Examples of the positive charge material include boehmite, poly DADMAC, Formaldehyde-colloidal silica, cross-linked polyethyleneimine, and the like.

The positive charge material can be compounded in the form of physical bonding or chemical bonding to the nonwoven fabric. The method for applying the positive charge material to the nonwoven fabric which is a material for removing microorganisms is not particularly limited, and the chemical bonding method may be, for example, hydrothermal polymerization. When the nonwoven fabric, which is a material for removing microorganisms, The same positive charge material can be bonded to the functional group of the nonwoven fabric. On the other hand, the physical bonding method can be applied by mixing a positive charge resin with a binder to coat the surface of the nonwoven fabric, which is a material for removing microorganisms. In this case, as the positive charge material,

In the present invention, as the material for removing microorganisms, it is more preferable to combine Boehmite with PET fiber.

In the water filter of the present invention, it is preferable that the microorganism removing layer, the pretreatment layer and the supporting layer are joined and integrated. The water filter of the present invention is formed into a corrugated shape by folding in a zigzag so as to increase the surface area. When the layers of the microorganism removing layer, the pretreatment layer and the supporting layer are simply laminated, the respective materials must be individually bent in the corrugated form, which may lead to a decrease in productivity. On the other hand, in the case of bending them simultaneously, the process is complicated, including a forming step, while supplying a material for each layer, and it is difficult to obtain the desired result.

Accordingly, it is preferable that the microorganism removing layer, the pretreatment layer and the support layer are laminated in the layer structure as exemplified above, and they are joined and integrated. By integrating the materials of each layer, the molding process can be further simplified.

As a method of integrating the layers, a method such as hot melt spraying, ultrasonic sealing, heat sealing, thermal bonding, and chemical bonding gravure bonding may be used . However, in the case of the ultrasonic sealing, the material tends to be hardened with respect to the sealed part, and there is a risk that the sealing part is damaged in the molding process due to bending.

More preferably, a hot-melt spraying method having the least possibility of leakage of the fabric during the sealing process and excellent in workability can be used. In the case of hot melt spraying, the binder is partially dispersed on the surface of the nonwoven fabric of each layer to reduce the possibility of blocking the pores of the nonwoven fabric. Further, the binder is uniformly dispersed on the nonwoven fabric surface of each layer, So that it is preferable.

Meanwhile, EVA (ethylene vinyl acetate) and propylene may be used as the binder in the hot melt spray method. Among them, in the case of using EVA, the vinyl acetate component can be eluted into a trace amount of water, and it is preferable to use propylene in order to secure material safety and dissolution safety.

A method of bonding each material by the hot-melt spraying method will be described as an example in which the water filter of the present invention has a structure of a support layer / primary tack layer / microbial removal layer / secondary tacky layer / support layer. However, the following description is not intended to limit the method of bonding the filter of the present invention, and it will be understood by those skilled in the art that the layer structure of the filter, the bonding method and the order thereof can be easily changed will be.

A binder is sprayed on at least one surface of each layer, that is, a surface in contact with the material of the other layer by a hot-melt spray method in the process of supplying the material of each layer, and then the layers are simultaneously bonded by applying pressure.

Further, any two or more layers may be selectively bonded first, and the mutually bonded bonded materials may be bonded to each other. For example, a propylene binder is bonded by hot-melt spraying between the support layer and the first tacky layer, and between the second tacky layer and the support layer. More specifically, for example, a propylene binder is hot-melted and bonded to one surface of either one of the support layers or the first tentative layer. Hot-melt spraying over the entire surface may be undesirable as it will close the pores of the material. In the same manner, the remaining one support layer and the second tablet layer are bonded together by hot-melt spraying. Next, a propylene binder is hot-melt sprayed on the other side of the first and second tablet layers to be bonded to both surfaces of the microorganism removing layer. Thereby, a water filter material having a structure of a support layer / primary tacky layer / microorganism removal layer / secondary tacky layer / support layer can be obtained.

Next, the integrated water filter material thus obtained is folded and formed into a corrugated form as shown in Fig. 1 (b). For example, the water filter material may be formed in a zigzag shape along the circumferential direction so as to have a generally cylindrical shape. Since the water filter is formed in a corrugated shape, the contact area with water can be increased to about 1.5 to 10 times. Therefore, by maximizing the effective filtration area of the water filter, the filtration performance can be further improved.

The water filter according to the present invention thus obtained can efficiently remove the particulate matter including microorganisms, reduce the burden on each layer, prolong the life of the filter material, It can be kept constant for a long time.

Example

Hereinafter, the present invention will be described in more detail with reference to examples. The following examples are illustrative of the present invention, and the present invention is not limited thereto.

Example 1

A boehmite was chemically bonded to the surface of a non-woven fabric made of PET fibers (average fiber diameter 35 μm, unit weight 120 g / m 2, average pore size 2 μm) as a microbial removal material by hydrothermal polymerization to prepare a composite.

A PP meltblown nonwoven fabric (having an average fiber diameter of 10 mu m, a unit weight of about 30 g / m < 2 > and an average pore size of 25 mu m) , A unit weight of about 20 g / m 2, and an average pore size of 20 탆) was prepared for use as a second material for a coating material.

Two PP spunbond nonwoven fabrics (average fiber diameter 30 占 퐉, unit weight 20 g / m2, average pore size 100 占 퐉) were prepared as support layer materials.

The prepared first stock material, one support layer material, the second stock material and the other support layer material were each laminated by a hot-melt spray method. In the hot-melt spray, propylene was used as a binder.

Then, the microorganism removing material was mutually lapped by a hot-melt spraying method so as to face the pretreatment layer of the bonded material of the supported support layer and the desiccant layer. In the hot melt spray, propylene was used as a binder in the same manner.

As a result, a filter having a support layer-a first pretreatment layer-a microorganism removal layer-a second pretreatment-support layer structure was prepared with a membrane area of 0.041 m 2.

The resulting filter was evaluated for the tapping performance and the flow-rate free power as described below. Fig. 2 shows the results of the tacking performance evaluation, and Fig. 4 shows the results of the flow rate holding force evaluation.

How to evaluate performance

- Water supply pressure: 3kgf / ㎠ Static pressure

- Concentration of particulate matter: 100 ppm (@ Arizona dust, particle size 0 to 5 μm)

- Measurement: Calculate cumulative removal amount of particulate matter up to reaching differential pressure 2.5kgf / ㎠

Method for evaluating flow retention force

- Flow rate: 2L / min (Initial flow rate)

- Concentration: 1 NTU (@ A2 dust, particle size 0 ~ 80um)

- Measurement standard: Calculate the cumulative flow rate up to the point of 20% flow rate reduction compared to the initial flow rate and confirm that the flow rate is reduced

Example 2

A filter having a membrane area of 0.047 m 2 was produced in the same manner as in Example 1.

The resulting filter was evaluated in terms of the tacking performance in the same manner as in Example 1, and the results are shown in Fig.

Comparative Example 1

A filter having a membrane area of 0.041 m 2 was prepared in the same manner as in Example 1, except that the first and second tacky layers were not included. The filter thus obtained has the structure of the support layer-microbial removal layer-support layer.

The filtration performance and the flow rate holding ability of the obtained filter were evaluated in the same manner as in Example 1, and the results are shown in FIG. 2 and FIG. 4, respectively.

Comparative Example 2

A filter having a membrane area of 0.047 m 2 was prepared in the same manner as in Example 2, except that the first and second pretreatment layers were not included. The filter thus obtained has the structure of the support layer-microbial removal layer-support layer.

The filtration performance of the obtained filter was evaluated in the same manner as in Example 1, and the results are shown in FIG.

Evaluation of particulate matter removal performance

As can be seen from FIG. 2 and FIG. 4, when the water filter according to the present invention is used, the performance of removing the particulate matter is remarkably superior to that of the comparative example.

Evaluation of flow retention

As can be seen from FIG. 3, in the case of using the water filter according to the present invention, the flow rate was maintained at a constant flow rate until the accumulated purified water amount reached 2500 L. However, when the filter of Comparative Example 1 was used, the flow rate gradually decreased after reaching the cumulative purified water amount of 1000 L, and the flow rate rapidly decreased near 1500 L.

The surface state of each layer of the filter after the performance of the tacking performance was evaluated by the above Example 1, and the results are shown in Fig. Furthermore, the particulate matter removal mechanism of the filter according to the present invention is also shown. This can be explained as follows.

The support layer, which is the first layer, protects the tablet layer and the microbial removal layer during the filter manufacturing process from the inlet side of the raw water to the water outlet direction of the raw water, and plays a role of preventing contamination and damage. Almost never. Therefore, even though the first layer is supplied with the raw water containing the most particulate matter, the contamination degree of the filter is not large. However, the backside of the first layer represents a contaminated condition, rather than due to the removal of the particulate matter, rather than the particulate matter removed from the front side of the first layer of the first layer, which is the second layer.

On the other hand, the first pretreatment layer performs the function of removing large particles, in which large particles are first removed from the surface and inside of the first stock material, thereby removing the particulate matter removed on both the front and back surfaces of the filter Respectively. In particular, the contamination of the backside shows that small particulate matter such as microorganisms and some large particulate matter pass through the first agent bed.

In addition, the microorganism removing layer functions to remove small particles and microorganisms in the raw water, and removes some large particles and fine particles that have passed through the first tablet layer. On the other hand, the microbial removal layer has a positive charge, thereby eliminating microorganisms having charge. This results in contamination of the front surface of the microbial removal layer. However, the back side shows a clean state, which is a result that micro particulate matter such as microorganisms did not pass through the microorganism removing layer.

Furthermore, the second pretreatment layer can prevent the particles, which have been filtered by the microorganism removal layer, from being discharged from the microorganism removal layer in a special situation such as high pressure, and to prevent the particles passing through the microorganism removal layer from flowing out into purified water.

Finally, the supporting layer on the outflow side is for the same function as the supporting layer of the water-receiving layer, and prevents contamination and damage of the pretreatment layer and the microbial removal layer.

Claims (19)

A microbial removal layer for removing microorganisms in the water; A pretreatment layer disposed on one side or both sides of the microbial removal layer and removing particulate matter in the water; And a support layer positioned on both sides of the outermost layer of the filter, wherein the microbial removal layer, the pretreatment layer, and the support layer are joined together to form a zigzag folded corrugated material. The water filter according to claim 1, wherein the water filter comprises a support layer / a primary tack layer / a microbial removal layer / a secondary tacky layer / a support layer, a support layer / a primary tacky layer / a microbial Removing layer / support layer, or support layer / microbial removal layer / secondary detachment layer / support layer. The water filter according to claim 1, wherein the microbial removal layer is formed by coating or chemically bonding a positive charge material to the nonwoven fabric substrate. The nonwoven fabric according to claim 3, wherein the nonwoven fabric of the microorganism removing layer is formed from a group consisting of a glass fiber, a polypropylene fiber, a polyacrylonitrile fiber, a polyvinylidene fluoride fiber, a polystyrene fiber, a polysulfone fiber, a polyester fiber and a cellulose fiber Wherein at least one selected filter is selected. The water filter according to claim 3, wherein the nonwoven fabric of the microbial removal layer has a unit weight of 0.5 g / m 2 to 300 g / m 2 and a pore size of 0.2 μm to 20 μm. 4. The method of claim 3, wherein the positive charge material is selected from the group consisting of boehmite, poly Diallyl dimethyl ammonium chloride (DADMAC), melamine formaldehyde / colloidal silica, and crosslinked polyethyleneimine And at least one filter selected from the group consisting of: The water filter according to claim 1, wherein the microbial removal layer is formed by combining boehmite with nonwoven fabric of PET fiber. The water filter according to claim 1, wherein the pretreatment layer is a nonwoven fabric material. 9. The water filter according to claim 8, wherein the non-woven fabric of the pretreatment layer is a nonwoven fabric of at least one fiber selected from the group consisting of polypropylene, PET, polyethylene, polyamide and cellulose. The water filter according to claim 8, wherein the nonwoven fabric of the pretreatment layer is a nonwoven fabric having a unit weight of 15-90 g / m 2 and a pore size of 5-100 탆. [Claim 3] The method of claim 2, wherein the first tablet layer is a nonwoven fabric having a unit weight of 20 to 50 g / m < 2 > and a pore size of 15 to 30 mu m, and the second tablet layer has a unit weight of 10 to 40 g / Wherein the nonwoven fabric of the first tablet layer and the nonwoven fabric of the second tablet layer are different in at least one of unit weight and pore size, the nonwoven fabric of the second tablet layer is larger in unit weight than the nonwoven fabric of the first tablet layer, Wherein the pore size is smaller. The water filter according to claim 1, wherein the support layer is a nonwoven fabric made of at least one fiber selected from the group consisting of polypropylene, PET, polyethylene, polyamide, and cellulose. The water filter according to claim 1, wherein the support layer is a nonwoven fabric having a basis weight of 15 to 90 g / m 2 and a pore size of 50 to 150 탆. The method of claim 1, wherein the microbial removal layer, the pretreatment layer and the support layer are joined together by at least one method selected from the group consisting of hot melt spray bonding, ultrasonic sealing, heat sealing, thermal bonding, chemical bonding and gravure bonding, Lt; / RTI > The water filter according to claim 1, wherein the microbial removal layer, the pretreatment layer and the support layer are joined by hot-melt spraying of EVA or a propylene binder. A microorganism removing material for removing microorganisms in water, a disposing material for removing particulate matter in water is placed on one side or both sides of the microorganism removing material, a supporting material is placed on both sides of the outermost layer of the filter, Forming a composite material by joining the tacky material and the supporting material in a predetermined order or at a time and integrating them; And
And bending the integrated composite material in a zigzag manner to form a corrugated shape. 17. The method of claim 16, wherein the bonding is performed by at least one method selected from the group consisting of hot melt spray bonding, ultrasonic sealing, heat sealing, thermal bonding, chemical bonding and gravure bonding. 17. The method of claim 16, wherein the bonding is performed by hot melt spray bonding using EVA, propylene as a binder. A free-standing carbon filter, comprising the water filter and the post-carbon filter according to any one of claims 1 to 15.

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