KR20150054513A - heat resistance cartridge filter and manufacturing method therefor - Google Patents

Abstract

The present invention relates to a heat-resistant cartridge filter and a manufacturing method thereof. The present invention is capable of increasing filtration efficiency and collection efficiency and reducing pressure loss as a multi-layered structure is formed by manufacturing filter slurry by mixing and stirring 75-85% by weight of heat-resistant short fibers having a particle size of 2 denier/12 mm or less and 15-25% by weight of ultrafine glass fibers having a particle size of 1-10 um, mixing the filter slurry in water at the headbox concentration of 0.05-1.00 mass% and 0.03-0.06 mass%, and laminating the mixture in a liquid state. In addition, the bending property and strength can be increased by impregnating a filter media, having water removed, in a thermosetting resin to 10-20% after the mixture is laminated in a liquid state. Moreover, the present invention enables to increase heat-resistant temperature and further enhances the bending property and strength at the same time by impregnating the filter media in a thermoplastic resin to 10-20%.

Description

TECHNICAL FIELD [0001] The present invention relates to a heat resistant cartridge filter material and a manufacturing method thereof,

The present invention relates to a heat resistant cartridge filter material and a method of manufacturing the same. More specifically, the present invention relates to a heat resistant cartridge filter material which is obtained by wet-laminating a filter slurry containing 75 to 85% by weight of heat resistant short fibers and 15 to 25% To a heat-resistant cartridge filter material capable of remarkably reducing dust emission concentration, enhancing dust removal efficiency, lowering pressure loss, and increasing collection efficiency, and a method for manufacturing the same.

As the industry develops and products are integrated or refined, the demand for process filters is rapidly increasing.

Such filter media are required to efficiently remove fine dust contained in the fluid, and at the same time, have a long service life. Accordingly, various studies have been made to increase the effective filtration area of the final module element .

Cartfidge filers have been studied in accordance with these efforts and are usually used for impregnation of acrylic resin, phenol resin, melamine resin and the like as a filter medium such as cellulose, nonwoven fabric (PE, PP, acrylic material) A method is known in which the resin is impregnated and cured to make it stiff, the resin is bent to enlarge the effective filtration area, and the bent filter is fixed to the inner core and the frame.

However, since the conventional cartridge filter is formed of an m-aramid wet-laid nonwoven fabric having a large particle size, the fibers forming the filter medium layer must be fixed by needle punching in a state where the dust discharge density is high and the bending is not easily performed. .

In addition, since the conventional cartridge filter has a single-layer structure, the pressure loss is large and the collection efficiency is low.

In the domestic patent No. 10-1000366 (name: filter for air cleaning), a filter is formed in a four-layer structure of a balky layer, an intermediate layer, a dense layer and a film layer in the direction from the air inflow side to the air outflow side, A filter medium for increasing the collection efficiency and capacity of dust in the air to be filtered is disclosed. However, since the surfactant used for binding each fiber layer in such a manner blocks the pores of the fiber layers, And the collection efficiency becomes low at the same time.

Also, in the domestic registered patent No. 10-0405318 (name: filter medium for air cleaner and its manufacturing method), a filter medium having a three-layer structure of a dense layer, an intermediate layer and a vulcanized layer and having a high collection efficiency and capacity is disclosed However, the filter media of this type is complicated in the process due to the separate process for performing the heat fusion because the bonding of the fiber layers is performed by the heat fusion, and the manufacturing cost is increased, Is destroyed.

 In addition, in domestic patent No. 10-0490864 (a method of manufacturing a high-temperature dust filter by resin impregnated coating), 15% of Teflon and 25% of a fluororesin mixed liquid are mixed, The present invention relates to a resin impregnated coating for improving the smoothness of the surface of a product by immersing the solution in a dissolution tank so as to contain a certain amount of solid content, And a method of manufacturing the dust filter.

However, since the filter material for high-temperature use such as the high-temperature dust filter manufacturing method is a thermosetting resin, it is difficult to thermal bond, and a product impregnated with a high-temperature resin for stiffening breaks the fiber during bending, Problems of extremely short life span occur.

Also, since the filter material for high temperature use in the method for manufacturing a high-temperature dust filter has a single-layer structure, it has a disadvantage that the pressure loss is large and the collection efficiency is low.

As described above, the present invention can be applied to a cartridge filter medium which can easily be folded without a separate bending means such as a needle punching, and at the same time a microfibre glass fiber having a high heat- This is an urgent issue.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a thermoplastic resin composition which comprises 75 to 85% by weight of a heat resistant short fiber having a particle size of 2 denier / 12 mm or less and 15 to 25% by weight of ultrafine glass fiber having a particle size of 1 to 10 μm, The filter slurry is mixed with water at a headbox concentration of 0.05 to 1.00 mass% and 0.03 to 0.06 mass%, and the filter slurry is laminated in a liquid phase to form a multi-layer structure, thereby improving filter efficiency and collection efficiency, To provide a heat-resistant cartridge filter medium for reducing pressure loss and a method for manufacturing the same.

Another object of the present invention is to provide a heat-resistant cartridge filter material capable of increasing the bending strength and strength by impregnating a filter medium having a moisture-removed layer after being laminated in a liquid state with 10 to 20% of a thermosetting resin, will be.

Further, another object of the present invention is to provide a heat-resistant cartridge filter material capable of increasing the heat-resistant temperature by further impregnating the filter media with the thermoplastic resin in an amount of 10 to 20% will be.

In order to solve the above problems, A method of manufacturing a cartridge filter medium for filtering fine dust by bending a multi-layered filter media, the method comprising the steps of: preparing a filter slurry for producing a filter slurry; A liquid phase laminating step of laminating the filter slurry produced by the filter slurry producing step in liquid phase at different headbox concentrations; A moisture removing step of removing moisture of the filter media which is the filter slurry stacked by the liquid phase laminating step; A bending step of bending the filter media dried by the water removal step using a known bending device; And a frame bonding step of bonding the filter media bent by the bending step to the inner core and the frame, wherein the filter slurry manufacturing step comprises the steps of: preparing 75 to 85% by weight of the heat resistant short fibers and 15 to 25 By weight of a surfactant; and a step of adding to the water as a dissolution liquid one of acid (hydrochloric acid) or dispersants having a concentration of PH 2 to 4 and then stirring to prepare a dispersion liquid , 1.5 to 2.5% by weight of the filter composition prepared by the filter composition production step and 97.5 to 98.5% by weight of the dispersion prepared by the dispersion preparation step are mixed and stirred to produce the filter slurry .

In the present invention, the filter composition prepared by the step of preparing the filter composition is preferably 100 to 250 g / m 2.

In the present invention, it is preferable that the heat-resistant staple fibers have a particle size of 2 denier / 12 mm or less.

In the present invention, the filter slurry laminated by the liquid phase laminating step forms a two-layer structure of a dense layer and a balky layer, wherein the dense layer and the balky layer are formed such that the filter slurry has a headbox concentration of 0.05 to 0.10 mass% and 0.03 To 0.06% by mass.

In the present invention, it is preferable that the method further comprises a step of impregnating the curved filter media after the bending step to impregnate the thermosetting resin-impregnated storage part with a weight of 10 to 20%, and a step of impregnating the filter media impregnated with the thermosetting resin- And a first drying step of drying the thermosetting resin remaining on the surface of the thermosetting resin.

In the present invention, the filter media, which has been dried by the first drying step, is impregnated into the storage part impregnated with the thermoplastic resin at a weight of 10 to 20%, and the step of impregnating the filter media impregnated by the thermoplastic resin impregnation step And a second drying step of drying the thermoplastic resin remaining on the surface.

Further, in the present invention, it is preferable that the thermoplastic resin is any one of heat-resistant phenol resin, epoxy resin and ceramic resin.

According to the present invention having the above-mentioned problems and solutions, the filter slurry in which the heat-resistant staple fiber and the ultrafine glass fiber are mixed and stirred is laminated in a liquid phase at different headbox concentrations to form a multilayer structure, And a low pressure loss.

According to the present invention, the exhaust gas can be easily exhausted including microfine glass fibers, and the fine dust can be filtered, thereby increasing the filter efficiency and reducing the dust emission concentration.

Further, according to the present invention, since the separate means for maintaining the bent state such as the needle punching is not used, the process is simplified.

Further, according to the present invention, since the filter medium is impregnated into the thermosetting resin at 10 to 20%, it is possible to increase the bending strength and the strength while minimizing the increase in the pressure loss.

According to the present invention, since the filter medium is impregnated into the thermoplastic resin in an amount of 10 to 20%, the heat resistance temperature is increased.

1 is a block diagram showing a heat-resistant cartridge filter medium according to an embodiment of the present invention.
Fig. 2 is an exemplary view showing the components contained in the heat resistant cartridge filter medium of Fig. 1; Fig.
3 is a flow chart showing a step of manufacturing a filter slurry.
4 is a flow chart showing a manufacturing process of a heat resistant cartridge filter medium, which is an embodiment of the present invention.
5 is a side view showing a filter fiber laminating apparatus applied to the liquid phase laminating step of Fig.
FIG. 6 is a perspective view of FIG. 5, except for the roof plate.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a heat resistant cartridge filter medium according to an embodiment of the present invention, and FIG. 2 is an exemplary view showing the ingredients contained in the heat resistant cartridge filter medium of FIG.

The heat resistant cartridge filter media 1 of Figures 1 and 2 are constructed such that filter slurries having different headbox concentrations are laminated in liquid form to form a two-layer structure of a vulcanized layer 5 and a dense layer 3, And the dense layer 3 are joined to the frame such as the inner core 7 in a state S in which the multilayered structure is bent.

The heat resistant cartridge filter medium 1 further comprises 75 to 85% by weight of heat resistant short fibers 50 having a particle size of 2 denier / 12 mm or less and 15 to 25% by weight of ultrafine glass fibers 60 having a particle size of 1 to 10 μm in an amount of 100 to 250 g / The filter slurry 20 is prepared by stirring the water (80) 97.5 to 98.5% by weight with respect to 1.5 to 2.5% by weight of the mixture 70 mixed with the first slurry 20 and the filter slurry 20, A resin solution 30 and a second resin solution 40 are laminated in a liquid phase to form a two-layer structure of a dense layer 3 and a vulcanized layer 5.

The filter slurry 20 is prepared by mixing 75 to 85% by weight of the heat resistant short fibers 50 having a particle size of 2 denier / 12 mm or less and 15 to 25% by weight of microfine glass fibers 60 having a particle size of 1 to 10 μm To 2.5% by weight of water (80), 97.5 to 98.5% by weight. At this time, if the amount of the ultrafine glass fibers 30 is less than 15 wt%, the content of the glass fibers becomes too low to reduce the filter efficiency. When the ultrafine glass fibers 30 are more than 25 wt%, the fibers are broken when the dust is desorbed.

The filter slurry 20 constructed as described above is separated into a head box concentration of 0.05 to 1.00 mass% and 0.03 to 0.06 mass%, and is stacked in a liquid phase by the liquid-phase laminator 300 of FIG. At this time, the first resin solution 30, which is the filter slurry 20 having the headbox concentration of 0.05 to 1.00 mass%, forms the dense layer 3 and the second slurry 20 of the filter slurry 20 having the headbox concentration of 0.03 to 0.06 mass% The resin solution (40) is solidified in the interlaminar bond without any other means and processes such as needle punching, surfactant, thermal fusion, etc. by forming the buffer layer (5), and the filter medium has a two- The pressure loss is low and the collection efficiency is increased.

The microfibre glass fiber 60 may be one of borosilicate glass, C glass with acid resistance, E glass (non-alkali glass) with electrical insulation, low boron glass and silica glass, or any mixture of at least two of them As shown in Fig.

The heat-resistant cartridge filter medium 1 also has a structure in which when the filter slurries 20 are stacked at different head box densities, moisture is absorbed through the suction portion 308 and the drying portion (not shown) of the liquid- And is pressed by the roller to increase moldability and binding force. At this time, since the water removal process and the pressurization process are commonly used in the manufacturing method of the cartridge filter material, detailed description thereof will be omitted.

Further, after the heat resistant cartridge filter member 1 is subjected to water removal and pressurization, the heat resistant cartridge filter member 1 is bent using a known bending device.

In the heat-resistant cartridge filter member 1, 10 to 20% of the impregnated portion containing the thermosetting resin is impregnated in the folded state (S), thereby increasing bending strength and strength. At this time, if the impregnation of the heat resistant cartridge filter element 1 is 20% or more, the pressure loss is excessively increased by the thermosetting resin, and if it is less than 10%, the bending property is deteriorated.

Further, the heat resistant cartridge filter member 1 is impregnated with 10 to 20% of the surface area of the housing portion containing the thermoplastic resin, and the heat resistance temperature is increased. At this time, the thermoplastic resin has excellent heat resistance properties such as phenol resin, epoxy resin, and ceramic resin.

As described above, the heat-resistant cartridge filter medium 1 according to an embodiment of the present invention has a two-layer structure in which a liquid phase is stacked to form a microfibre glass fiber 60 and a heat resistant short fiber 50 having high collection efficiency and low pressure loss. The pressure loss and the dust emission concentration can be reduced, and 10 to 20% of the surface area can be impregnated into the thermosetting resin and the thermoplastic resin, thereby increasing the bending strength and strength.

3 is a flow chart showing a step of manufacturing a filter slurry.

The filter slurry production step S10 comprises a filter composition production step S11, a dispersion producing step S12 and a stirring step S13.

The filter composition preparation step (S11) is a step of preparing a filter composition composed of the heat resistant short fibers (50) and the ultrafine glass fibers (60). At this time, it is preferable that the heat resistant short fibers 50 have a particle size of 2 denier / 12 mm or less and 75 to 85 wt%, and the ultrafine glass fibers 60 have a particle size of 1 to 12 μm and 15 to 25 wt%.

In addition, the ultrafine staple fiber 60 may be one of borosilicate glass, acidic C glass, electrically insulating E glass (alkali-free glass), low boron glass and silica glass, or a mixture of at least two of them One short glass fiber.

The dispersion preparation step (S12) is a process step of adding an acid (hydrochloric acid) or a dispersant having a concentration of PH 2 to 4 to water as a dissolution liquid and then adding the additive into a pulper to prepare a dispersion liquid.

In the stirring step S13, the filter composition prepared in the filter composition preparing step S11 and the dispersion solution prepared in the dispersion preparing step S12 are introduced into a pulper and stirred to produce a filter slurry 20 . In this case, the filter slurry 20 is preferably composed of 97.5 to 98.5% by weight of a dispersion and 1.5 to 2.5% by weight of a filter composition.

As described above, the filter slurry production step S10 produces the filter slurry 20 through the steps of the filter composition production step S110, the dispersion production step S120 and the stirring step S130 as shown in FIG. At this time, the filter slurry produced by the stirring step S10 is supplied to the first mixing step S20 and the second mixing step S30 of FIG. 4, respectively.

4 is a flow chart showing a manufacturing process of a heat resistant cartridge filter medium, which is an embodiment of the present invention.

4, the filter slurry production step S1 of the filter slurry production step S10 of FIG. 3 and the filter slurry production step S10 of the filter slurry production step of FIG. A first mixing step (S20) of producing a first resin solution (30) mixed with water at a head box density of 0.03 to 0.06 mass%, and a filter slurry production step (S10) (S30) for preparing a second resin solution (40) by mixing the resin solution with water at a concentration of 1 wt% and a second resin solution (40) prepared by the first mixing step (S20) A liquid phase laminating step (S40) of laminating the first resin solution (30) and the second resin solution (40) in liquid phase through the liquid phase laminator (300) of Fig. 5 to be described later and the liquid phase laminating step A moisture removing step (S50) for dehydrating and curing the media, and a water removing step (S50) for pressing the filter media from which moisture has been removed A compression molding step S70 for bending the filter medium pressed by the pressing step S60 and a pressing step S60 using a known bending device and a bending molding step S70 for bending the filter media bent by the bending molding step S70, A thermosetting resin impregnation step (S80) for impregnating the resin-impregnated receiving part such that only 10 to 20% of the impregnated resin part is impregnated; and a first drying step for drying the thermosetting resin remaining on the surface by the thermosetting resin impregnation step (S80) (S100) of impregnating the filter media dried by the first drying step (S90) into the housing part impregnated with the thermoplastic resin so as to impregnate only 10 to 20% by weight of the housing with the thermoplastic resin impregnated step (S100) A second drying step (S110) of drying the thermoplastic resin remaining on the surface by the first drying step (S100), a frame combining step (S110) of bonding the filter media dried by the second drying step (S110) to the inner core and the frame (S120) It is.

In the first mixing step S20, the filter slurry 20 produced by the filter slurry production step S10 is mixed with water at a headbox concentration of 0.05 to 1.00 mass% to prepare the first resin solution 30. [ At this time, the produced first resin solution forms a dense layer (3).

In the second mixing step (S30), the filter slurry (20) produced by the filter slurry producing step (S10) is mixed with water at a headbox concentration of 0.03 to 0.06 mass% to prepare a second resin solution (40). At this time, the second resin solution 40 thus formed forms a buffer layer 5.

The first resin solution 30 and the second resin solution 40 produced by the first mixing step S20 and the second mixing step S30 may be used in an amount of 0.05 to 1.00 mass% And 0.03 to 0.06 mass% of the headbox concentration, the headbox concentration of the first resin solution 30 and the second resin solution 40 is not limited to this, The density of the head box may be set such that the density of the dense layer 3 formed by the second resin solution 30 is smaller than that of the vulcanized layer 5 formed by the second resin solution 40. [

The liquid-phase laminating step S40 is a step of laminating the first resin solution 30 produced by the first mixing step S20 and the second resin solution 40 produced by the second mixing step S30, And is stacked in a liquid phase through the liquid-phase laminator 300.

The water removing step S50 is a process step of removing moisture of the slurry laminated in the liquid phase by the liquid phase laminating step S40 and is performed by the suction unit 308 of the liquid phase laminator 300 of Fig. To remove moisture from the slurry. At this time, it is preferable that the suction portion 308 sucks air with a vacuum pressure of 10 to 100 cmHg.

The pressing step S60 is a processing step for pressing the dried filter media from the water removing step S50 to increase the interlayer bonding force and to maintain the moldability of the filter media. At this time, the pressing step S50 presses the filter media through the filter media between the rollers which are positioned adjacent but opposite to each other, not shown in the drawing, and the rollers generate a pressure of 100 to 1,000 kgf / cm2.

The bending forming step S70 bends the pressurized filter media by a pressing step S60 using a known bending device.

The thermosetting resin impregnating step (S80) is a process step of impregnating the filter medium bent by the bending forming step (S70) into the receiving part impregnated with the thermosetting resin at 10 to 20%, and the thermosetting resin is applied to the surface area, The bending strength and strength are increased.

At this time, in the step of impregnating the thermosetting resin (S80), if the impregnation rate of the thermosetting resin exceeds 20%, the pressure loss is excessively increased by the thermosetting resin. If the impregnation rate of the thermosetting resin is less than 10% I can not.

The first drying step (S90) is a processing step of removing the thermosetting resin remaining on the surface area of the filter media by the thermosetting resin impregnating step (S80).

The thermoplastic resin impregnation step (S100) is a process step of impregnating the filter medium dried by the first drying step (S90) into the receiving part impregnated with the thermoplastic resin at 10 to 20%, and applying the thermoplastic resin to the surface area, And the bending strength and strength are further increased.

In this case, the thermoplastic resin has high heat resistance characteristics such as phenol resin, epoxy resin, and ceramic resin, thereby increasing the heat resistance of the heat resistant cartridge filter.

In the thermoplastic resin impregnation step (S100), when the impregnation rate of the thermoplastic resin is less than 10%, the desired heat resistance is not exhibited. When the impregnation rate of the thermoplastic resin exceeds 20%, the pressure loss is excessively increased by the thermoplastic resin do.

The second drying step (S110) is a processing step for removing the thermoplastic resin remaining on the surface area of the filter media by the thermoplastic resin impregnation step (S100).

The frame coupling step (S110) fixes the filter media dried by the second drying step (SlOO) to the inner core and the frame.

Fig. 5 is a side view showing a filter fiber laminating apparatus applied to the liquid phase laminating step of Fig. 4, and Fig. 6 is a perspective view excluding the roof plate in Fig.

The first resin solution produced by the first mixing step S20 and the second resin solutions prepared by the second mixing step S30 are applied to the liquid phase laminating step S40 of Figs. Device.

In addition, the filter fiber laminating apparatus 300 includes a housing 311 having one side and an upper surface opened and having an internal space and having one side formed as an inclined surface, and a cover plate (not shown) provided on the opened upper surface of the housing 311 313 and the inner space of the housing 311 formed inside the housing 311 of the housing 301 is formed of a plate material so that the inner space of the housing 311 is divided into the first housing space 321 and the second housing space 311. [ A first inlet 322 for introducing the first resin solution and the second resin solution into the first housing space 321 and the second housing space 322 of the housing 311, The opening 311 of the housing 311 is formed at a predetermined distance from the inclined opening 331 of the housing 311. The opening 331 of the housing 311 is formed by a plate member, A loop 306 in which resin solutions discharged through the loop plate 306 are stacked in a liquid phase on the upper surface, a rotation unit 307 which loops the loop plate 306, A suction unit 308 provided at a lower portion of the roof plate 306 located under the opening 331 to suck the moisture of the filter media stacked on the roof plate 306, And a storage portion 309 which is formed as an enclosure and is installed on the ground according to the path of the roof plate 306 and receives the water drained from the suction portion 308 and the roof plate 306.

In the filter fiber laminating apparatus 300 configured as described above, the inner space of the housing 311 is divided into the first housing space 321 and the second housing space 322 by the separation portion 303, The second resin solution 40 is introduced into the first accommodation space 322 through the second inflow path 305 and accommodated in the first accommodation space 321 formed in the upper portion of the second accommodation space 322, The first resin solution 30 is introduced and accommodated through the first resin solution 304.

The first resin solution 30 and the second resin solution 40 accommodated in the first accommodating space 321 and the second accommodating space 322 are moved to the end of the separating part to form the inclinedly formed openings 331 To the upper portion of the roof plate 306. [ At this time, since the roof plate 306 is moved in the direction A from the bottom to the top, if the first resin solution 40 is initially placed on the upper surface of the roof plate 306, (30) are stacked.

The inclined angle of the opening 331 of the housing 311 and the roof plate 306 is preferably 10 to 45 degrees. At this time, if the inclination angles of the opening 331 and the roof plate 306 are less than 10 degrees, the fiber layers are piled up in a flat state, so that the air permeability is increased beyond a desired value. If the inclination angle is more than 45 degrees, Since the filter fibers of the filter slurry solution discharged to the upper surface of the roof plate are moved downward along the roof plate in a state where they are not stacked, the laminating process is not efficiently performed.

It is preferable that the loop plate 306 is a microfine mesh of hydrophilic PET mesh 70 to 80 and is adjusted according to the height of the slurry and the thickness of the filter media. Specifically, the loop plate 306 has a speed of 10 to 100 m / min .

The moisture of the filter media stacked on the upper portion of the roof plate 306 is drained to the lower portion of the roof plate 306 through drainage grooves (not shown), while the fibers of the filter media can not pass through the drainage grooves 306, respectively. At this time, the suction portion 308 provided at the lower portion of the roof plate 306 immediately under the opening of the housing 311 sucks the moisture of the filter media formed on the roof plate 306, It is efficiently removed.

The suction portion 308 sucks the slurry deposited on the upper portion of the roof plate 306 to remove 90% or more of the moisture of the slurry, and more specifically, generates a vacuum pressure of 10 to 100 cmHg.

Hereinafter, the heat-resistant cartridge filter according to one embodiment of the present invention will be described in more detail with reference to Examples and Comparative Examples. The following embodiments are for illustrative purposes only and do not limit the scope of protection of the present invention.

Table 1 is a table showing the components contained in Examples 1 and 2 of the present invention.

Example 1 Example 2 Dense layer Head box concentration (% by mass) 0.50 1.00 Heat-resistant short fibers (% by weight) 85 (particle size 2.0 denier / 6 m) 75 (particle size 2.0 denier / 12 m) Ultrafine glass fiber (% by weight) 15 (particle size 0.3 mu m) 25 (particle size 1.0 mu m) Weight (g / ㎡) 50 50 Vulcanization layer Head box concentration (% by mass) 0.03 0.06 Heat-resistant short fibers (% by weight) 85 (particle size 2.0 denier / 6 m) 75 (particle size 2.0 denier / 12 m) Ultrafine glass fiber (% by weight) 15 (particle size 0.3 mu m) 25 (particle size 1.0 mu m) Weight (g / ㎡) 90 90 Thermosetting resin impregnation rate 10 10 Thermoplastic resin impregnation rate 10 10

Examples 1 and 2 of Table 1 are as follows.

A dense layer having a headbox density of 0.50% by mass and having a weight of 50 g / m < 2 > mixed with 85% by weight of 2.0 denier / 6 mm of m-aramid heat resistant fiber and 15% by weight of 0.3 m of ultrafine glass fiber;

And a binder layer having a head box density of 0.03% by mass and a weight of 90 g / m < 2 > mixed with 85% by weight of 2.0 denier / 6 mm of m-aramid heat resistant fiber and 15% by weight of 0.3% microfine glass fiber,

A heat-resistant cartridge filter medium impregnated with 10% by weight of each of the thermosetting resin and phenol resin.

A dense layer having a headbox density of 1.00% by mass and having a weight of 50 g / m < 2 > mixed with 75% by weight of 2.0 denier / 12 mm of m-aramid heat resistant fibers and 25% by weight of 1.0 m microfine glass fibers;

And a vulcanized layer having a head box density of 0.06 mass% and a weight of 90 g / m < 2 > in which 75 weight% of 2.0 denier / 12 mm of m-aramid heat resistant fiber and 25 weight% of 1.0 micron ultra-

A heat-resistant cartridge filter medium impregnated with 10% by weight of each of the thermosetting resin and phenol resin.

The filtration times, the amount of filtered dust, the average concentration of exhaust air, the bursting strength, the heat resistance temperature and the air permeability of the filter media prepared as described above were measured and shown in Table 2. The number of filtrations is defined as the number of contaminant supply times until the filter function of the filter medium is completed.

Table 2 shows the measured values of the filtration times, the amount of filtered dust, the average concentration of exhaust air, the burst strength, the heat resistance temperature and the air permeability of the filter medium according to Examples 1 and 2.

division Example 1 Example 2 Filter filter material filtration times (recovery) 11 10 Total filter weight before test (g) 724.4 724.5 Total filter weight after test (g) 752.7 753.4 Filtered amount of dust 28.3 28.9 Average discharge air concentration (mg / m3) 0.404 0.403 Bursting strength (Kgf) 4.04 3.98 Heat temperature (℃) 134 131 Pressure loss (mmAq) 7.4 7.3 Air permeability (cc / cm2 / sec) 17.12 17.31

As shown in Table 2, in Example 1 of the heat resistant cartridge filter element 1, the number of filtration was 11, the amount of filtered dust was 28.3 g, the discharge air average concentration was 0.404 mg / m3, the burst strength was 4.04 kgf, 17.12 cc / cm < 2 > / sec.

In Example 2, the number of filtrations was 10, the amount of filtered dust was 28.9 g, the average discharge air concentration was 0.403 mg / m 3, the burst strength was 3.98 kgf, and the air permeability was 17.31 cc / cm 2 / sec.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Dense layer Head box concentration (% by mass) 0.50 0.50 0.50 0.50 Heat-resistant short fibers (% by weight)
(2.0 denier / 6 m) 100 65 90 65 Ultrafine glass fiber (weight%) (particle size 6 mu m) 35 10 35 Weight (g / ㎡) 140 50 50 50 Vulcanization layer Head box concentration (% by mass) 0.03 0.03 0.03 Heat-resistant short fibers (% by weight)
(2.0 denier / 6 m) 65 90 65 Ultrafine glass fiber (weight%) (particle size 6 mu m) 35 10 35 Weight (g / ㎡) 90 90 90 Thermosetting resin impregnation rate 10 10 10 Thermoplastic resin impregnation rate 10 10 10

Table 3 is a table showing the components contained in Comparative Examples 1 to 4. At this time, in Comparative Examples 1 to 4, the particle size of heat-resistant staple fibers was 2.0 denier / 6 m, and the particle size of ultrafine staple fibers was 6 μm.

[Comparative Example 1]

Heat-resistant cartridge filter medium having a headbox density of 0.50% by mass and made of 100% by weight of heat-resistant fibers and impregnated with phenol resin in an amount of 10% by weight.

[Comparative Example 2]

A dense layer having a headbox density of 0.50% by mass and having a weight of 50 g / m < 2 > mixed with 65% by weight of heat resistant fibers and 35% by weight of ultrafine glass fibers;

And a vulcanized layer having a head box density of 0.03 mass% and a weight of 90 g / m < 2 > mixed with 65 weight% of heat resistant fiber and 35 weight% of ultrafine glass fiber,

A heat-resistant cartridge filter medium impregnated with 10% by weight of each of the thermosetting resin and phenol resin.

[Comparative Example 3]

A dense layer having a headbox density of 0.50% by mass and having a weight of 50 g / m < 2 > mixed with 90% by weight of heat resistant fibers and 10% by weight of ultrafine glass fibers;

A bulky layer having a head box density of 0.03% by mass and a weight of 90 g / m < 2 > mixed with 90% by weight of heat resistant fibers and 10% by weight of ultrafine glass fibers,

A heat-resistant cartridge filter medium impregnated with 10% by weight of each of the thermosetting resin and phenol resin.

[Comparative Example 4]

A dense layer having a headbox density of 0.50% by mass and having a weight of 50 g / m < 2 > mixed with 65% by weight of heat resistant fibers and 35% by weight of ultrafine glass fibers;

And a vulcanized layer having a head box density of 0.03 mass% and a weight of 90 g / m < 2 > mixed with 65 weight% of heat resistant fiber and 35 weight% of ultrafine glass fiber,

10% by weight of thermosetting resin-impregnated heat-resistant cartridge filter media.

Table 4 shows the filtration times, the amount of filtered dust, the average concentration of exhaust air, the bursting strength, the heat resistance temperature and the air permeability of the filter materials prepared in the same manner as in Table 2.

division Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Filter filter material filtration times (recovery) 76 10 32 31 Total filter weight before test (g) 724.4 724.5 723.1 722.8 Total filter weight after test (g) 730.2 732.3 732.7 731.1 Filtered amount of dust 5.8 7.8 9.6 8.3 Average discharge air concentration (mg / m3) 7.698 6.541 3.246 3.317 Bursting strength (Kgf) 3.14 2.84 3.87 3.79 Heat temperature (℃) 119 133 132 117 Pressure loss (mmAq) 18.70 16.24 8.63 8.89 Air permeability (cc / cm2 / sec) 19.68 8.13 15.54 15.66

Comparative Example 1 with reference to Table 4 shows that since the microfine dust can not be filtered due to the absence of microfibers, the filter efficiency is lowered and the filtration efficiency is decreased due to the formation of a single layer structure, It can be seen that it falls excessively.

In addition, in Comparative Example 1, the thermosetting resin is not impregnated and the heat resistance steel is low.

In Comparative Example 2, since the ultrafine glass fibers forming the filter slurry were 35% by weight and the heat-resistant short fibers were formed by 65% by weight, the content of the ultrafine glass fibers was large and the filter efficiency for fine dust was increased. In comparison, it can be seen that the pressure loss is excessively high, thus the filter function is lost, the amount of filtered dust is reduced, and the average concentration of exhaust air is increased.

In Comparative Example 3, since the ultrafine glass fibers forming the filter slurry were 10% by weight and the heat-resistant short fibers were formed by 90% by weight, the content of the ultrafine glass fibers was so low that the filter efficiency against fine dust was decreased. 1, the filtered dust amount is low, and the filtration recovery and the average concentration of exhaust air are increased

Compared with Comparative Example 2, the thermoplastic resin impregnation was not performed in Comparative Example 4, and the heat resistance temperature was found to be lowered.

That is, as can be seen from the results of Table 3, it is possible to reduce the pressure loss by mixing the ultrafine glass fibers in an appropriate ratio to increase the filter efficiency and the collection efficiency, and to form the filter media with a multi- .

1: cartridge filter media 3: dense layer 5:
20: filter slurry 30: first resin solution 40: second resin solution
50: heat-resistant short fiber 60: ultrafine glass fiber

Claims (7)

1. A method for fabricating a cartridge filter medium for filtering fine dust by bending a multi-layered filter media comprising:
A filter slurry producing step of producing a filter slurry;
A liquid phase laminating step of laminating the filter slurry produced by the filter slurry producing step in liquid phase at different headbox concentrations;
A moisture removing step of removing moisture of the filter media which is the filter slurry stacked by the liquid phase laminating step;
A bending step of bending the filter media dried by the water removal step using a known bending device;
And a frame engaging step of engaging the filter media bent by the bending step to the inner core and the frame,
The filter slurry preparation step
A filter composition comprising 75 to 85% by weight of a heat-resistant short fiber and 15 to 25% by weight of ultrafine glass fiber having a particle size of less than 12 탆; and a step of preparing a filter composition by mixing the water as a dissolution liquid with an acid Hydrochloric acid) or dispersants, followed by stirring to prepare a dispersion, and a step of preparing a filter composition comprising 1.5 to 2.5% by weight of the filter composition prepared by the step of preparing the filter composition, And mixing and agitating 97.5 to 98.5% by weight of the dispersion to produce the filter slurry. The method of claim 1, wherein the filter composition prepared by the filter composition preparation is 100 to 250 g / m 2. The method of claim 1, wherein the heat-resistant short fibers form a particle size of 2 denier / 12 mm or less. The filter slurry as claimed in claim 1, wherein the filter slurry deposited by the liquid phase laminating step forms a two-layer structure of a dense layer and a balky layer, wherein the dense layer and the balky layer are formed such that the filter slurry has a headbox concentration of 0.05 to 0.10% By mass to 0.06% by mass. The method according to any one of claims 1 to 4, further comprising the steps of: after the bending step, impregnating the bent filter media with the thermosetting resin-impregnated storage part at a weight of 10 to 20% Further comprising a first drying step of drying the thermosetting resin remaining on the surface of the filter media impregnated by the step of drying the filter media. The method of claim 5, wherein the filter media is dried by the first drying step. The thermoplastic resin impregnation step comprises impregnating the storage part impregnated with the thermoplastic resin at a weight of 10 to 20% Further comprising a second drying step of drying the thermoplastic resin remaining on the surface of the filter material. The method for manufacturing a filter medium according to claim 6, wherein the thermoplastic resin is any one of a heat-resistant phenol resin, an epoxy resin, and a ceramic resin.

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