KR102376836B1 - Three-layer filter using Wet-laid method and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a three-layer structure filter using a wet method and a manufacturing method thereof, and according to the present invention, a raw material step for preparing a support material and a filter material; a first papermaking step of forming a support with the support material; a second papermaking step of forming a first filter layer with the filter material on the upper side of the support; a dehydration step of dehydrating the support and the first filter layer by pressing; A wet method comprising a laminating step of laminating a dehydrated support and a melt-brown filter on the upper side of the first filter layer to form a second filter layer, and a drying step of drying the three-layer filter on which the support, the first filter layer and the second filter layer are formed It is possible to provide a manufacturing method of the used three-layer structure filter.
In addition, a support formed of a support material including a fiber, a binder, and a functional additive; A three-layer structure filter using a wet method comprising a first filter layer and a melt-brown filter in which a filter raw material containing activated carbon and fibers is paper-made on the upper side of the support, and a second filter layer formed by laminating on the upper side of the first filter layer can provide

Description

Three-layer filter using wet-laid method and manufacturing method thereof

The present invention relates to a three-layer structure filter using a wet method and a method for manufacturing the same, and more particularly, it is possible to reduce manufacturing time and cost by manufacturing the three-layer structure filter in one-step through a wet-laid method. And, it relates to a three-layer structure filter using a wet method having excellent deodorization performance by using fiber, activated carbon, a binder, and a functional additive, and a method for manufacturing the same.

The 4th industrial revolution is focused on making human living environment more convenient and healthy living, but with the rapid growth of industrialization and the explosive increase in energy demand, various environmental pollution accompanying it is getting worse day by day, Among them, air pollution is the most closely affecting human health.

Air pollution has reached a very serious level, including yellow dust and fine dust coming from China, as well as various fine dust and dust generated by the use of oil or coal, as well as VOCs and various harmful gases, etc. As a result, the demand for various air filter products is increasing rapidly.

Not only outdoor air pollution, but also indoor air pollutants pose a great threat to health, and according to the World Health Organization (WHO), about 4.2 million people die from indoor air pollution a year than those who die from outdoor air pollution. It is statistically high, and it has been reported that the probability of indoor pollutants reaching the lungs is about 1000 times higher than outdoors.

Representative indoor air pollutants include fine dust, smoking, nitrogen dioxide (NO ₂ ), carbon monoxide (CO), carbon dioxide (CO ₂ ), radon, asbestos, pathogenic bacteria, and volatile organic compounds (VOCs). , the major causes are the inflow of pollutants contained in the outside air into the room, construction materials, insufficient ventilation due to sealing, indoor smoking, and the use of combustion devices.

Among indoor pollutants, volatile organic compounds (VOCs), which have recently been considered a problem, are highly toxic to the nervous system as well as the respiratory and circulatory systems, reduce sensory ability in the peripheral nervous system, and contain carcinogenicity and genotoxicity. am.

Therefore, research to effectively remove volatile organic compounds (VOCs) is being actively conducted, and the deodorization filter using activated carbon is excellent in removing VOCs and odors (ammonia, acetic acid), and there is a demand for a deodorizing filter with higher performance. is an increasing situation.

Recently, as an air purifier deodorizing filter product, a filter with excellent air permeability and activated carbon base paper is preferred to improve deodorization performance.

However, the existing filter products are produced through a total of three processes by using a dry support, placing activated carbon and functional fibers on the support, and laminating the melt blown.

This conventional manufacturing process is time consuming, requires a lot of manpower, and is made in a complicated manufacturing method, and there were problems in process contamination and poor workability due to the dry process.

Accordingly, there is a need for technological development for a filter capable of improving such a problem and a method for manufacturing the same.

In order to solve the above problems, the present invention can reduce manufacturing time and cost by manufacturing a three-layer structure filter in one-step through a wet-laid method, and fibers, activated carbon, binders and functional additives An object of the present invention is to provide a three-layer structure filter using a wet method having excellent deodorization performance and a method for manufacturing the same.

In order to solve the above problems, a method for manufacturing a three-layer structure filter using a wet method according to an embodiment of the present invention includes: a raw material step of preparing a support material and a filter material; a first papermaking step of forming a support with the support material; a second papermaking step of forming a first filter layer with the filter raw material on the upper side of the support; a dehydration step of dehydrating the support and the first filter layer by pressing; A wet method comprising a laminating step of laminating the dehydrated support and a melt-brown filter on the upper side of the first filter layer to form a second filter layer, and a drying step of drying the three-layer filter on which the support, the first filter layer and the second filter layer are formed It is possible to provide a manufacturing method of the used three-layer structure filter.

Here, the raw material step may include a first raw material step of preparing a support raw material using fibers, a binder, and a functional additive, and a second raw material step of preparing a filter raw material using activated carbon and fibers.

In addition, the first raw material step may include a dispersing step of mixing and dispersing fibers in water, and a first treatment step of adding and mixing a binder and a functional additive to the dispersed fibers.

In addition, in the dispersion step, the fiber is characterized in that it includes a low-fusion yarn and PP/PE fiber.

In addition, the second raw material step may include a beating step of dissociating the fibers and then beating them, and a second roughing step of adding activated carbon, a binder and a functional additive to the beating fibers and mixing them.

In addition, the drying step is characterized in that the three-layer structure filter is dried at 110 to 130 ℃.

In addition, before the drying step, it may further include a coating step of coating by spraying a functional adhesive on the surface.

In addition, the three-layer structure filter using the wet method according to an embodiment of the present invention includes a support formed of a support material including a fiber, a binder, and a functional additive; A three-layer structure filter using a wet method comprising a first filter layer and a melt-brown filter in which filter raw materials containing activated carbon and fibers are paper-made on the upper side of the support, and a second filter layer formed by laminating on the upper side of the first filter layer can provide

In addition, it may further include a coating layer coated by spraying a functional additive.

The three-layer structure filter and its manufacturing method using the wet method according to the embodiment of the present invention as described above can reduce manufacturing time and cost by manufacturing the three-layer structure filter in one-step through the wet-laid method. and workability can be improved.

In addition, by manufacturing the support using a binder and a fiber including a low fusion yarn and PP/PE fiber, it is possible to maintain the electrostatic force while having air permeability.

In addition, the first filter layer and the second filter layer made of a melt blown filter made of activated carbon, low-fusion yarn, and fibers including PP/PE fibers are configured to have excellent deodorization performance.

In addition, deodorization performance may be further improved by forming a coating layer through a functional additive.

1 is a flowchart schematically showing a method of manufacturing a three-layer structure filter using a wet method according to an embodiment of the present invention.
2 is a flowchart schematically illustrating step S1 of a method for manufacturing a three-layer filter using a wet method according to an embodiment of the present invention.
FIG. 3 is a flowchart sequentially showing steps S10 of FIG. 2 .
4 is a flowchart sequentially illustrating steps S11 of FIG. 2;
5 is a cross-sectional view showing a three-layer structure filter using a wet method according to an embodiment of the present invention.

Since the present invention can have various changes and can have various forms, specific embodiments will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terms used in the present application are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a combination of features, numbers, steps, components, etc. described in the specification exists, and includes one or more other features or numbers, It should be understood that the possibility of the presence or addition of combinations of steps, elements, etc. is not precluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Here, repeated descriptions, well-known functions that may unnecessarily obscure the gist of the present invention, and detailed descriptions of configurations will be omitted. The embodiments of the present invention are provided in order to more completely explain the present invention to those of ordinary skill in the art.

Hereinafter, it will be described in detail with reference to FIGS. 1 to 5 for explaining an embodiment of the present invention.

The present invention can reduce manufacturing time and cost by manufacturing a layer structure filter in one-step through a wet-laid method, and has a three-layered layer with excellent deodorization performance by using fiber, activated carbon, binder and functional additives. An object of the present invention is to provide a manufacturing method capable of manufacturing a structural filter, and a three-layer structural filter manufactured through this method.

First, a method for manufacturing a three-layer structure filter using a wet method according to an embodiment of the present invention will be described.

1 is a flowchart schematically showing a method of manufacturing a three-layer structure filter using a wet method according to an embodiment of the present invention, and FIG. 2 is a method of manufacturing a three-layer structure filter using a wet method according to an embodiment of the present invention. It is a flowchart schematically illustrating step S1, FIG. 3 is a flowchart sequentially illustrating step S10 of FIG. 2, and FIG. 4 is a flowchart sequentially illustrating step S11 of FIG.

Referring to Figure 1, the manufacturing method of the three-layer structure filter using the wet method according to an embodiment of the present invention is a raw material step (S1), a first papermaking step (S2), a second papermaking step (S3), a dehydration step ( S4), a lamination step (S5) and a drying step (S6) may be included.

First, the raw material step (S1) is a step of preparing a support material and a filter material to form the support 10 and the first filter layer 20. As shown in FIG. 2, the first raw material step (S10) and the second It may include a raw material step (S11).

At this time, as shown in FIG. 2 , the first raw material step ( ) and the second raw material step ( ) may be performed in the order, but the present invention is not limited thereto, and the steps S11 and S10 may be performed in the order, or the two steps may be performed simultaneously. there is.

Specifically, in the first raw material step ( S10 ), the support raw material may be prepared using fibers, binders, and functional additives.

Referring to FIG. 3 , step S10 may include a dispersion step ( S100 ) and a first treaty step ( S101 ).

Dispersing step (S100) may be dispersed by mixing the fibers in water. That is, step S100 is to dissociate the fibers in water to dissociate them and to refining the fibers by mixing. The support 10 formed in the first papermaking step (S2) has an appropriate moisture content, so that the generation of contamination during movement is reduced. It is possible to make it possible and to have a bonding force.

Here, the fibers may include low-fusion yarns and PP/PE fibers, and may include low-fusion yarns and PP/PE fibers in a weight ratio of 6:4.

The weight ratio is an optimal ratio having excellent workability and bonding strength, and when the weight ratio of the fibers is out of range, workability and bonding strength may be reduced.

The low-melting yarn is preferably low-melting polyester (LMPET), but is not limited thereto.

In addition, the PP/PE fiber used in step S100 has excellent dispersibility and in order to prevent the activated carbon from being drawn out of the first filter layer 20, it is preferable that the denier is 0.8, but is not limited thereto.

Specifically, in step S100, a dispersing agent may be added to water to disperse, and then the fibers may be mixed and dispersed.

More specifically, in step S100, after adding and dispersing 0.3 to 0.5 parts by weight of a dispersant to 100 parts by weight of water, 1 to 1.9 parts by weight of the fibers can be mixed to disperse the fibers, and 0.4 parts by weight of the dispersing agent is dispersed in 100 parts by weight of water. it is preferable

At this time, when the dispersing agent is less than 0.3 parts by weight, dispersibility is reduced and entanglement between fibers may occur, and when it is more than 0.5 parts by weight, dehydration may not be performed properly in the wet process.

In addition, when the amount of the fiber is less than 1 part by weight, it may be difficult to control the weight in the production process, and when it exceeds 1.9 parts by weight, the dispersibility is lowered and entanglement between the fibers may occur.

This step S100 can be performed in the beater tank, which is to facilitate the dispersion of fibers, because when high-RPM equipment such as a mixer is used, entanglement between fibers may occur.

The first preparation step (S101) may be mixed by adding a binder and a functional additive to the fibers dispersed in step S100. In this case, step S101 may be performed in a stirred tank.

Here, the binder is one of polyvinyl alcohol (PVA), acrylic, low-melting polyester (LMPET), polyethylene terephthalate (PET), and wood fiber to improve the bonding force of the support material and to secure air permeability and maintain electrostatic force. may include more than one.

Through such a binder, it is possible to improve bonding strength during manufacturing of the support, and to improve the problems of lowering strength and lowering quality.

The functional additive is a water repellent agent, and improves the water repellency and oil repellency of the support to enable maintenance and protection of the filter performance, and prevent the air permeability and efficiency from being reduced.

Step S101 may be mixed by adding 5 to 15 parts by weight of a binder and 15 to 25 parts by weight of a functional additive to the dispersed fibers, and it is more preferable to add 10 parts by weight of a binder and 20 parts by weight of a functional additive.

At this time, if the binder is less than 5 parts by weight, the binding force may be lowered, and quality such as strength may be deteriorated, and if it is more than 15 parts by weight, deodorization performance may be deteriorated.

In addition, when the amount of the functional additive is less than 15 parts by weight, the water repellency and oil repellency improvement and antifouling effect are insignificant, and when it exceeds 25 parts by weight, the quality may be deteriorated due to lowering of bonding strength, etc.

In the second raw material step (S11), a filter raw material may be prepared using activated carbon and fibers.

Referring to FIG. 4 , step S11 may include a confession step (S110) and a second treaty step (S111).

The beating step (S110) is a step of beating the fibers after dissociating them, and the fibers are put in water and stirred so that they are completely dissolved, and the fibers can be beaten by physically impacting the dissociated fibers using a beating machine. In this way, the fibers can be made into short fibers.

Here, the fiber may include a low-fusion yarn and a PP/PE fiber, and the low-fusion yarn is preferably low-melting polyester (LMPET), but is not limited thereto.

In addition, the PP / PE fiber used in step S110, in order to increase the air permeability, it is preferable that the denier is 3, but is not limited thereto.

In addition, in step S110, the dissociated fibers may be beaten at a rotation speed of 600 rpm or more at a concentration of 3 wt% or less using a beater.

By beating the fibers at the same concentration as described above, the first pulter layer 20 formed in the second papermaking step (S3) has an appropriate moisture content, so that the generation of contamination can be reduced when moving to the dehydration step (S4). If the beating concentration exceeds the concentration of 3% by weight, it is preferable that the beating is performed at a concentration of 3% by weight or less, because the occurrence of contamination may increase and the bonding strength may be lowered.

In addition, when the rotation speed during beating is less than 600 rpm, the beating efficiency may be lowered due to a decrease in dispersibility, etc.

In addition, in step S110, it is preferable to beat the dissociated fibers so that the beating degree is 43 to 47°SR.

This is because, when the beating degree is out of the above range, the added activated carbon does not have its own binding force, so the quality and productivity such as binding force and dispersibility of the filter raw material may be reduced, and the occurrence of contamination may increase.

In the second treaty step (S111), activated carbon, a binder and a functional additive may be added to the fibers beaten in the step S110 and mixed. After step S110, by adding the activated carbon, the binder, and the functional filler, the effect on the porous structure of the activated carbon can be minimized, and the addition of the activated carbon, the binder, and the functional filler can be made stably.

Here, the activated carbon is capable of effectively removing volatile organic compound (VOCs) gas, and may be one of palm-based activated carbon, coal-based activated carbon, wood-based activated carbon, and carbon black, and it is preferable to use a particle size of 20 to 5000 μm. .

This is because, when the particle size of activated carbon is less than 20㎛, dispersibility is good, but the pressure loss is too large, so it is not suitable for a filter, and when it exceeds 5000㎛, the dispersibility is poor.

In addition, it is preferable to use activated carbon with a specific surface area of 550 m ² /g or more and an iodine adsorption capacity of 700 mg/g or more in consideration of deodorization performance.

This is because the larger the specific surface area, the more pores exist, and the iodine adsorption power can mean the size of the pores. That is, when the specific surface area and iodine adsorption capacity of the activated carbon are configured as described above, it is preferable to use the activated carbon as described above because it shows a desirable deodorizing performance.

The more the activated carbon is added, the better the removal function is, so it is better to add as much as possible. However, there was a problem in that the base paper became heavy and the strength was weakened as the content of the activated carbon increased. When prepared together, the above limitations do not occur, so that the maximum amount of activated carbon can be added.

Accordingly, 70 parts by weight or more of activated carbon may be added in 100 parts by weight of the fiber in step S111.

At this time, when the amount of activated carbon is less than 70 parts by weight, volatile organic compound (VOCs) gas removal efficiency may be reduced.

The binder is to prevent fall-off of activated carbon and improve processability, and may include at least one of polyvinyl alcohol (PVA), acrylic, low-melting polyester (LMPET), polyethylene terephthalate (PET), and wood fibers.

Through such a binder, the binding force is improved when the first filter layer is manufactured, so that the activated carbon without its own binding force may not fall off, and the problem of strength deterioration and quality deterioration is improved, so that the maximum content of activated carbon can be added.

When the binder as described above is used, the porous structure of the activated carbon is not blocked, so that it is possible to effectively prevent the activated carbon from falling off without affecting the deodorizing performance.

For this, the binder may be 8 to 12 parts by weight in 100 parts by weight of the fiber, and is preferably added in an amount of 10 parts by weight to the fiber.

At this time, when the binder is less than 8 parts by weight, the effect of preventing the activated carbon from falling off and improving workability is insufficient, and when it exceeds 12 parts by weight, the deodorization performance may be deteriorated.

Functional additives supplement the deodorization function of activated carbon, and although activated carbon is easy to remove aromatic compounds such as benzene and toluene, it has some limitations in removing aldehydes such as acetaldehyde and formaldehyde.

These functional additives have no inhalation toxicity and are easy to remove aldehydes, and may be one or more of zeolite, cyclodextrin, carbon fiber, and amine-based weak acid-based compounds, but is not limited thereto.

To this end, in 100 parts by weight of the fiber, the functional adhesive may be 1 to 10 parts by weight, and is preferably added to the fiber in an amount of 8 parts by weight.

At this time, when the functional additive is less than 1 part by weight, the aldehyde removal and supplementary effect is insufficient, and when it exceeds 10 parts by weight, the physical properties of the first filter layer 20 containing activated carbon are affected due to a decrease in binding force, etc., so that the three-layer structure It may affect the quality of the filter (1).

In addition, in step S111, a surfactant, an anti-foaming agent, a dispersing agent, a degassing agent, and a coagulant may be further added to the fiber and mixed.

The surfactant is for improving the miscibility with the fiber, and may be one of nonionic, cationic and anionic, and it is preferable to adjust the added content according to the situation.

The bubble inhibitor improves the productivity of the first filter layer 20 containing the activated carbon, and in 100 parts by weight of the fiber, 1 to 5 parts by weight may be added, and 3 parts by weight is preferably added.

In this case, when the amount of the foam inhibitor is less than 1 part by weight, the foam suppression effect may be insufficient, and when it exceeds 5 parts by weight, the physical properties of the first filter layer may be deteriorated.

The dispersant improves dispersibility to facilitate mixing with the fiber, and may be added in an amount of 0.05 to 0.5 parts by weight, preferably 0.1 parts by weight, in 100 parts by weight of the fiber.

At this time, when the dispersant is less than 0.05 parts by weight, the effect of improving the dispersibility is insignificant, and when it exceeds 0.5 parts by weight, the physical properties of the first filter layer may be rather deteriorated due to lowering of binding properties, etc.

The degassing agent effectively removes the colloidal air of the fiber and removes the bubbles that may occur in the second papermaking step (S3), thereby solving the problem, and in 100 parts by weight of the fiber, 0.5 to 1.5 parts by weight and 1 part by weight is preferably added.

At this time, when the degassing agent is less than 0.5 parts by weight, the effect of removing bubbles and promoting dehydration is insignificant, and when it exceeds 1.5 parts by weight, the effect and economical efficiency may be ineffective.

The degassing agent preferably uses a silicone-based degassing agent so as to exhibit an effective dehydration promoting effect, but is not limited thereto.

The coagulant is to improve the bonding strength, and in 100 parts by weight of the fiber, 0.1 to 1 part by weight may be added, and 0.5 part by weight is preferably added.

At this time, when the coagulant is less than 0.1 parts by weight, the effect of improving the binding force is insignificant, and when it exceeds 0.5 parts by weight, the productivity may be reduced.

As described above, in step S111, activated carbon, a binder and a functional additive are added to the beaten fibers as described above and mixed for 10 minutes or more at a rotation speed of 600 rpm or more to prepare a filter raw material.

The first papermaking step ( S2 ) is a step of forming the support body 10 with the support material prepared in step S1 , and the support material 10 may be formed by paper-writing the support material to form a base paper.

The second papermaking step (S3) is a step of forming the first filter layer 20 as a filter material on the upper side of the support 10 formed in step S2. The first filter layer 20 may be manufactured.

The dehydration step (S4) is a step of dehydration by pressing the support 10 and the first filter layer 20 formed in a two-layer structure, and can be dehydrated in consideration of peelability, and the support 10 and the first filter layer 20 ) can improve the bonding force between

Laminating step (S5) is a step of laminating the dehydrated support 10 and the melt brown filter on the upper side of the first filter layer 20 to form the second filter layer 30, the support 10, the first filter layer 20 and a second filter layer 30 to form a three-layer filter having a three-layer structure.

Here, the melt-brown filter constituting the second filter layer 30 is coated with an oil-repellent and water-repellent material, and has a particle diameter of 1 to 5 μm, and an air permeability of 10 to 100 cc/cm ² /sec.

In the drying step (S6), the final three-layer structure filter (1) can be obtained by drying the three-layer structure filter (1) prepared in the step S5.

In step S6, the three-layer structure filter may be dried at 110 to 130°C, and drying at 110°C is preferable.

At this time, when the drying temperature is less than 110 ℃, the surface is not dried easily and the low-fusion yarn and the binder do not react at a low temperature, so it may be difficult to perform the role of a supporter due to a decrease in bonding strength. Separation or the filter may be hardened and broken.

In addition, the manufacturing method of the three-layer structure filter according to an embodiment of the present invention may further include a coating step (not shown) before step S6.

The coating step is a step of coating the surface of the three-layer filter by spraying the functional additive, and by spraying the functional additive on the surface, the supplemental effect of removing aldehydes can be further maximized.

In this case, the functional additive has no inhalation toxicity and is easy to remove aldehydes, and may include at least one of zeolite, cyclodextrin, carbon fiber, and an amine-based weak acid-based compound.

When used in the coating step, these functional additives may be used by dissolving 8 to 12 parts by weight in 100 parts by weight of water at 90 to 100° C., and it is preferable to dissolve 10 parts by weight in water at 95° C.

If the water temperature is out of the above range, there may be difficulties in spraying, and when the dissolved content of the functional fiber additive is less than 8 parts by weight, the improvement of the supplemental effect of removing aldehydes is insignificant, and when it exceeds 12 parts by weight, it is uneconomical compared to the effect can be

In addition, the coating step may be coated by spraying the functional additive as described above at a rate of 90 to 110 g/min, and it is preferable to spray the coating at a rate of 100 g/min.

In addition, the manufacturing method of the three-layer structure filter according to an embodiment of the present invention may further include an additional coating step (not shown).

In the additional coating step, the three-layer filter may be subjected to oxygen plasma treatment, immersed in an aqueous metal salt solution for 10 to 30 minutes, and then dried at 90 to 110° C. for 100 to 130° C. minutes.

Here, the metal salt aqueous solution may be sodium chloride or copper sulfate aqueous solution, but is not limited thereto.

Through this additional coating step, metal ions are bound to the surface, so that functions such as hydrophilicity, electrical conductivity and antimicrobial properties can be improved.

In addition, the manufacturing method of the three-layer structure filter according to an embodiment of the present invention may include a winding step (not shown) and a packaging step (not shown).

The winding step is a step of collecting the manufactured three-layer filter by winding it on a roll or the like.

In the packaging step, the wound three-layer structure filter can be packaged to protect it from the outside to prevent damage, etc., and to facilitate distribution.

It is possible to provide a three-layer structure filter 1 using a wet method manufactured by the manufacturing method as described above.

As shown in FIG. 5, the three-layer filter includes a support 10 formed of a support material including fibers, a binder, and a functional additive, and a filter raw material including activated carbon and fibers formed by papermaking on the upper side of the support. It may include a filter layer 20 and a melt-brown filter, and a second filter layer 30 formed by laminating on an upper side of the first filter layer.

In addition, it may further include a coating layer (not shown) coated by spraying a functional adhesive.

As described above, the three-layer structure filter using the wet method and the manufacturing method thereof according to the embodiment of the present invention manufacture the three-layer structure filter in one-step through the wet-laid method, thereby manufacturing time and cost. can be reduced and workability can be improved.

In addition, by manufacturing the support using a binder and a fiber including a low fusion yarn and PP/PE fiber, it is possible to maintain the electrostatic force while having air permeability.

In addition, the first filter layer and the second filter layer made of a melt blown filter made of activated carbon, low-fusion yarn, and fibers including PP/PE fibers are configured to have excellent deodorization performance.

In addition, deodorization performance may be further improved by forming a coating layer through a functional additive.

Hereinafter, the present invention will be described in more detail by way of Examples.

However, the following examples are only illustrative of the present invention, and the content of the present invention is not limited by the following examples.

[ Example ]

[Example 1]

A support material is formed by paper-writing a support material, a filter material is paper-papered thereon to form a first filter layer, and after dehydration by compression, a melt-brown filter is laminated to form a second filter layer, and an amine-based-weak acid-based compound 10 A solution prepared by dissolving 100 parts by weight of water at 95° C. was sprayed, and then dried to prepare a three-layer filter.

In this case, the raw material for the support is prepared by adding a dispersing agent to water and dispersing, then adding and mixing fibers (low-fusion yarn and PP/PE fiber), and then adding a binder and a water repellent.

Filter raw materials are prepared by dissociating fibers (low-fusion yarns and PP/PE fibers) in water, refining the dissociated fibers, and adding activated carbon, binders and functional additives to the beating pulp.

[Comparative Example 1]

It was prepared in the same manner as in Example 1, except that the solution prepared by dissolving 10 parts by weight of the amine-based-weak acid-based compound in 100 parts by weight of water at 95° C. was not sprayed.

[ Experimental example 1] Functionality in the adhesive Deodorization performance evaluation according to

In order to evaluate the deodorization performance according to the functional additive, the ammonia and acetaldehyde removal efficiencies of Example 1 and Comparative Example 1 were tested and measured as follows.

Example 1 and Comparative Example 1 were each put in a Tedler bag (10L), filled with ammonia and acetaldehyde, and the gas concentration was measured after 30 minutes.

The results are shown in Table 1 below.

Initial gas concentration Example 1 Comparative Example 1 Ammonia (ppm) 60 10 20 Acetaldehyde (ppm) 85 23 58

As can be seen from Table 1, it was confirmed that Example 1 improved both ammonia and acetaldehyde removal efficiency by 50% or more compared to Comparative Example 1.

[ Example ]

[Example 2]

A support material is formed by paper-writing a support material, a filter material is paper-papered thereon to form a first filter layer, dehydrated by pressing, and then a melt-brown filter is laminated to form a second filter layer, and an amine-based-weak acid-based compound 10 A solution prepared by dissolving 100 parts by weight of water at 95° C. was sprayed, and then dried to prepare a three-layer filter.

In this case, the raw material for the support is prepared by adding a dispersing agent to water and dispersing it, then adding and mixing fibers (low-fusion yarn and PP/PE fiber), and then adding a binder and a water repellent.

Filter raw materials are prepared by dissociating fibers (low-fusion yarns and PP/PE fibers) in water, refining the dissociated fibers, and adding activated carbon, binders and functional additives to the beating pulp.

Here, activated carbon having a specific surface area of 800 m ² /g and an iodine adsorption capacity of 600 mg/g was used.

[Comparative Example 2]

Activated carbon was prepared in the same manner as in Example 1, except that activated carbon having a specific surface area of 529 m ² /g and an iodine adsorption capacity of 729 mg/g was used.

[Comparative Example 3]

Activated carbon was prepared in the same manner as in Example 1, except that activated carbon having a specific surface area of 460 m ² /g and an iodine adsorption capacity of 755 mg/g was used.

[Comparative Example 4]

Activated carbon was prepared in the same manner as in Example 1, except that activated carbon having a specific surface area of 509 m ² /g and an iodine adsorption capacity of 714 mg/g was used.

[Comparative Example 5]

Activated carbon was prepared in the same manner as in Example 1, except that activated carbon having a specific surface area of 450 m ² /g and an iodine adsorption capacity of 680 mg/g was used.

[Comparative Example 6]

Activated carbon was coated on a support (paper), dried, and a binder was coated and dried, followed by laminating a melt-brown filter to prepare a filter.

[ Experimental example 2] Evaluation of deodorization performance according to activated carbon

In order to evaluate the deodorization performance according to the activated carbon, the experiment was carried out as follows.

Examples 2 and Comparative Examples 2 to 5 were cut to 10 X 10 cm, respectively, put in a Tedler bag (10L), and after gas was injected, thermocompression bonding using a sealer, and measuring the concentration of each gas after 30 minutes , was evaluated by calculating the removal rate compared to the initial gas concentration.

Here, ammonia, acetic acid, acetaldehyde, toluene, and formaldehyde were used as gas.

The results are shown in Table 2.

Iodine adsorption capacity (mg/g) Specific surface area (m ² /g) deodorization performance gas Removal rate (%) Example 1 800 600 ammonia 92.1 acetic acid 94.9 acetaldehyde 80.0 toluene 86.7 formaldehyde 94.5 Comparative Example 2 729 529 ammonia 83.9 acetic acid 80.0 acetaldehyde 70.5 toluene 82.9 formaldehyde 87.5 Comparative Example 3 755 460 ammonia 83.9 acetic acid 92.9 acetaldehyde 59.0 toluene 81.6 formaldehyde 89.3 Comparative Example 4 714 509 ammonia 87.1 acetic acid 85.7 acetaldehyde 60.3 toluene 84.2 formaldehyde 88.1 Comparative Example 5 680 450 ammonia 82.0 acetic acid 79.9 acetaldehyde 55.8 toluene 80.3 formaldehyde 85.7

As can be seen from Table 2, Example 2 has superior deodorization performance in all gases than Comparative Examples 2 to 5 using activated carbon corresponding to at least one of less than 700 mg/g of iodine adsorption power and 550 m ² /g of specific surface area could check

[ Experimental example 3] Deodorization performance evaluation

The deodorization performance of Example 2 and Comparative Example 5 was measured and evaluated.

The results are shown in Table 3.

gas type initial concentration Example 2 Comparative Example 6 ammonia 60 6 20 acetic acid 66 6 11 acetaldehyde 85 17 58 toluene 74 10 18 formaldehyde 14.5 1.0 4.9

(Unit: ppm) As can be seen from Table 3, it was confirmed that Example 2 was superior to Comparative Example 6 in removing all gases.

The embodiments of the present invention described above can be implemented by various substitutions, modifications, and changes within the scope without departing from the technical spirit of the present invention, and such implementation can be implemented by those skilled in the art to which the present invention pertains from the description of the above-described embodiments. it can be implemented easily

1: 3-layer structure filter
10: support
20: first filter layer
30: second filter layer

Claims (9)

a raw material step of preparing a support raw material and a filter raw material;
a first papermaking step of forming a support with the support material;
a second papermaking step of forming a first filter layer with the filter raw material on the upper side of the support;
a dehydration step of dehydrating the support and the first filter layer by pressing;
Laminating step of laminating the dehydrated support and the melt-brown filter on the upper side of the first filter layer to form a second filter layer;
A drying step of drying the three-layer structure filter on which the support, the first filter layer and the second filter layer are formed,
The raw material step is
A first raw material step of manufacturing a support raw material using fibers, binders and functional additives, and
It includes a second raw material step of manufacturing a filter raw material using activated carbon and fiber,
The fiber of the support raw material,
It contains a low-fusion yarn and a PP/PE fiber of 0.8 denier,
The fiber of the filter raw material,
It contains low fusion yarn and 3 denier PP/PE fiber,
The second raw material step,
After dissociating the fibers, a beating step of beating the dissociated fibers to a beating degree of 43 to 47° SR; and
Method of manufacturing a three-layer structure filter using a wet method comprising the second preparation step of adding and mixing 70 parts by weight or more of activated carbon, 8 to 12 parts by weight of a binder, and 1 to 10 parts by weight of a functional additive to 100 parts by weight of the beaten fiber .
delete According to claim 1,
The first raw material step,
A dispersing step of mixing and dispersing fibers in water and
A method for manufacturing a three-layer structure filter using a wet method comprising the first roughening step of adding and mixing a binder and a functional additive to the dispersed fibers.
delete delete According to claim 1,
The drying step is
Method of manufacturing a three-layer structure filter using a wet method, characterized in that the drying of the three-layer structure filter at 110 to 130 ℃.
According to claim 1,
Before the drying step,
A method of manufacturing a three-layer structure filter using a wet method further comprising a coating step of coating the surface by spraying a functional additive.
a support formed of a support material including fibers, binders, and functional additives;
A first filter layer formed by papermaking a filter raw material including activated carbon and fibers on the upper side of the support;
Consists of a melt-brown filter, comprising a second filter layer laminated on the upper side of the first filter layer,
The fiber of the support raw material,
It contains a low-fusion yarn and a PP/PE fiber of 0.8 denier,
The fiber of the filter raw material,
It contains low fusion yarn and 3 denier PP/PE fiber,
The filter material is
Using a wet method, characterized in that it is prepared by mixing 70 parts by weight or more of activated carbon, 8 to 12 parts by weight of a binder, and 1 to 10 parts by weight of a functional additive to 100 parts by weight of the beaten fibers so that the beating degree is 43 to 47° SR 3-layer structure filter.
9. The method of claim 8,
A three-layer structure filter using a wet method further comprising a coating layer coated by spraying a functional additive.

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