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WO2019177289A1 - Filtre planaire multicouche ayant une transmittance de lumière visible et une haute durabilité, permettant de bloquer des particules fines en appliquant simultanément une collecte électrostatique et une collecte physique, et procédé de fabrication associé - Google Patents

Filtre planaire multicouche ayant une transmittance de lumière visible et une haute durabilité, permettant de bloquer des particules fines en appliquant simultanément une collecte électrostatique et une collecte physique, et procédé de fabrication associé Download PDF

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Publication number
WO2019177289A1
WO2019177289A1 PCT/KR2019/002436 KR2019002436W WO2019177289A1 WO 2019177289 A1 WO2019177289 A1 WO 2019177289A1 KR 2019002436 W KR2019002436 W KR 2019002436W WO 2019177289 A1 WO2019177289 A1 WO 2019177289A1
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WIPO (PCT)
Prior art keywords
mesh
nanofiber web
web layer
visible light
chargeable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/002436
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English (en)
Korean (ko)
Inventor
정진태
추정현
한상범
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iso Inc
WELL-TECH GLOBAL Co Ltd
Original Assignee
Iso Inc
WELL-TECH GLOBAL Co Ltd
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Publication of WO2019177289A1 publication Critical patent/WO2019177289A1/fr
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/025—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanofibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B01D2239/0492—Surface coating material on fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing

Definitions

  • the present invention relates to a multi-layered planar filter having a visible light transmittance and high durability, and a method for manufacturing the same, which block fine dust by simultaneously applying electrostatic collection and physical collection.
  • a filter is a filtration device that filters foreign substances in a fluid and is classified into a liquid filter and an air filter.
  • air filters are used in semiconductor manufacturing, computer equipment assembly, hospitals, etc. to remove biologically harmful substances such as microparticles such as dust, biological particles such as bacteria or mold, bacteria, etc. It is used in food processing factories, agriculture, forestry and fisheries, and is widely used in dusty workplaces and thermal power plants.
  • Such fine dust blocking facilities include a filter method, a scrubber method, and an electrostatic precipitator method.
  • the fine dust blocking filter network using the filter physically collects the fine dust by the effects of inertia, blocking, diffusion, and gravity, or static electricity. It can collect electrically by.
  • the principle of physically collecting fine dust by the inertia, blocking, diffusion, and gravity effects is that fine dust approaches the filter through the flow of air and is trapped on the fiber of the filter by the inertia to escape from the airflow, It is the effect of being trapped in the pores of the fiber of the filter by the size, or is trapped in the fiber due to the diffusion of fine dust in Brown movement irrespective of the flow of air or out of the flow due to gravity.
  • the electrical effect by the static electricity is the effect that the fine dust suspended in the air has an electric polarization and is collected by the electrostatic force on the fibers of the filter forming an electric field, that is, a magnetic field around, or induced charge is generated on the fiber surface .
  • the specific surface area is very high and the pore size of the nanoscale is higher than that of the conventional filter, and thus, fine dust having a size of 10 ⁇ m or less can be collected more efficiently.
  • Korean Patent Publication No. 10-2017-0120372 discloses a window filter for blocking fine dust and a method of manufacturing the same.
  • the present invention discloses a method of protecting a nanofiber layer with a medium such as a polyester mesh after high temperature spinning of a nanofiber on a substrate such as a polyester mesh.
  • the filter of the present invention requires a large number of nanofiber web layers to secure sufficient dust collecting performance by collecting fine dust only with a simple physical effect. As a result, the air permeability is lowered, the air permeability is sharply lowered, and the visible light transmittance including light is deteriorated to impair the external view.
  • Korean Patent No. 10-1668395 discloses a filter having nanofibers and a method of manufacturing the same.
  • the filter which fixes a nanofiber to the surface of a base material with a binder is disclosed.
  • the filter of the present invention has the disadvantage that the nanofibers are directly exposed to the outside, so that the nanofibers cannot be damaged by friction.
  • Korean Patent No. 10-1144448 discloses an electrostatic filter manufacturing method and an electrostatic filter using the same.
  • the present invention discloses a method for producing an electrostatic filter by manufacturing a nonwoven fabric as an electrostatic filter material by penetrating an electrostatic material together with a binder to make the woven fiber semi-permanently exhibit an electrostatic force.
  • the filter of the present invention is a filter that is applied inside a mechanical device such as an air filter of an automobile. When the light transmittance including visible light is not secured, when used in a window or a door, the outside view cannot be seen.
  • an aspect of the present invention provides a visible light transmissive multilayer structure planar filter for fine dust blocking which simultaneously performs physical collection and electrostatic collection. Particularly, visible light for blocking fine dust, which has high visible light transmittance, can be seen on the outside even when installed in windows or doors, and has excellent wear strength due to external qualification and excellent durability.
  • a transparent multilayer planar filter Provided is a transparent multilayer planar filter.
  • a fiber comprising: a chargeable mesh substrate knitted or woven with filament yarn formed by coating a chargeable polymer resin on a fiber; A nanofiber web layer laminated on one surface of the substrate by spinning; And a mesh structure knitted or woven with monofilament yarns, wherein the unit mesh constituting the mesh structure has a polygonal structure of hexagonal shape or more; stacked in sequence, and the protective mesh is attached to the nanofiber web layer.
  • a visible light-transmitting multilayered planar filter for dust blocking is provided.
  • the fibers may be any one or more fibers selected from the group consisting of glass fibers, aluminum fibers, steel fibers, high strength polyethylene fibers, metaaramid fibers, and paraaramid fibers. .
  • the chargeable polymer resin may have a positive charge affinity value of +30 nC / J or more or a negative charge affinity value of ⁇ 30 nC / J or less It may have a triboelectric coefficient in the range (negative charge affinity value).
  • the chargeable polymer resin in any one of the first aspect to the third aspect is one or two selected from the group consisting of polyvinyl chloride, polypropylene, polyamide and polyethylene terephthalate. It may be more than one species.
  • the nanofiber web layer is composed of nanofibers having a diameter of 500 nm to 1.5 ⁇ m and has a basis weight in the range of 0.1 to 2 g / m 2. Can be.
  • the protective mesh may be provided with chargeability.
  • a method of fabricating a nonwoven fabric comprising: (S1) obtaining a chargeable mesh substrate knitted or woven from a filament yarn formed by coating a high-strength fibrous polymer resin; (S2) nanofibers on the surface of the chargeable mesh substrate Spinning to form a nanofiber web layer; And (S3) attaching a protective mesh on the nanofiber web layer having a mesh structure knitted or woven with monofilament yarn, wherein the unit mesh constituting the mesh structure has a polygonal structure of hexagonal shape or more.
  • the method may further include applying a binder to the nanofiber web layer between steps (S2) and (S3).
  • Visible light-transmitting multilayer structure plane filter for fine dust blocking by using a chargeable mesh substrate knitted or woven with filament yarn formed by coating a high-strength fibrous polymer resin on the high-strength fibers, the fine dust electrostatic Can be captured.
  • Visible light-transmitting multilayer filter plane filter for blocking fine dust is because both the electrostatic collection by the electrostatic mesh substrate and the physical collection by the nanofiber web layer, so that fine dust and / or yellow dust Since the filtration capacity is maximized, even when the nanofiber web layer is used in a lower basis weight, it has excellent fine dust barrier properties, has an appropriate level of porosity, and has a high light transmittance to ensure sufficient visible light transmission so that the external view is not obstructed.
  • one side of the nanofiber web layer is provided with a chargeable mesh base material having a certain strength
  • the other side of the nanofiber web layer is provided with a protective mesh, excellent in air permeability, visible light transmittance and dust collection efficiency, Falling of the nanofiber web layer due to the environment can be prevented, and the multi-layered planar filter can be used to wash the brush, for example, to have durability.
  • each unit mesh constituting the protective mesh is formed to have a polygonal shape of hexagon or more, the adhesion of the protective mesh to the nanofiber web layer and the chargeable mesh substrate is greatly improved, and as a result, the life of the multi-layered planar filter This will have a longer effect.
  • the multi-layered planar filter according to the present invention can be produced by a simple process in which a nanofiber web layer is radiated on a chargeable mesh structure and a protective mesh is laminated thereon, so that the process efficiency is higher than that of a conventional lattice filter. This has an excellent advantage.
  • FIG. 1 is a side view schematically showing a multi-layered planar filter for blocking fine dust according to an embodiment of the present invention.
  • FIG. 2 is a plan view schematically showing a planar filter for visible light transmissive multilayer structure for preventing fine dust according to an embodiment of the present invention.
  • FIG. 3 is an SEM image of a visible light transmissive multilayer structure planar filter for blocking fine dust according to an embodiment of the present invention.
  • FIG. 4 is a view showing fine dust is physically collected (in a circle denoted by '1') or electrostatically collected (in a circle denoted by '2') in a visible light-transmitting multilayer structure planar filter for blocking fine dust according to an embodiment of the present invention. SEM image.
  • a chargeable mesh substrate knitted or woven with filament yarn formed by coating a chargeable polymer resin on a fiber; A nanofiber web layer laminated on one surface of the substrate by spinning; And a mesh structure knitted or woven with monofilament yarns, wherein the unit mesh constituting the mesh structure has a polygonal structure of hexagonal shape or more; stacked in sequence, and the protective mesh is attached to the nanofiber web layer.
  • a visible light-transmitting multilayered planar filter for dust blocking is provided.
  • FIG. 1 A side view of a visible light transmitting multilayer structure planar filter for fine dust blocking according to an embodiment of the present invention is shown in FIG. 1.
  • the chargeable mesh substrate 50 is located at the lowest layer
  • the nanofiber web layer 51 is positioned on the chargeable mesh substrate 50
  • the protective mesh 53 is positioned on the nanofiber web layer 51. .
  • the chargeable mesh base 50 may be knitted or woven into a filament yarn formed by coating a chargeable polymer resin on a fiber.
  • the filament yarn according to an aspect of the present invention may be in a form in which fibers constitute an inner core and a chargeable polymer resin constitutes a sheath.
  • the cross section of the filament yarn may be a shape such as a circle, an ellipse, a square, a rectangle, but is not limited thereto.
  • the chargeable mesh substrate 50 has a thickness of 0.1 to 0.5 mm to impart a certain level or more of mechanical strength to the multilayered flat filter, and is well permeable to ensure air permeability while simultaneously transmitting light to provide excellent visible light. It may have a 10 to 30 mesh eye size to ensure transmission. The eye may have a shape such as square, rectangle, rhombus, oval, hexagon, but is not limited thereto. In addition, the chargeable mesh substrate 50 may have a basis weight of 100 to 150 g / m 2 so that the multi-layered planar filter has an ideal level of mechanical strength and ensures excellent visible light transmission.
  • a high-strength fiber may be used so that the fine dust-blocking visible light-transmissive multilayered flat filter has excellent wear strength and the mesh structure is maintained in a constant shape.
  • the high strength fibers include glass fiber, steel fiber, aluminum fiber, ultra high molecular weight polyethylene (UHMWPE), meta-aramid fiber (m-Aramid), para-aramid fiber (p-Aramid) May be, but is not limited thereto.
  • the chargeable polymer resin is applied so that the filament yarn has a chargeability to electrostatically collect fine dust and / or yellow sand.
  • the fiber itself has chargeability and has a certain strength, it is understood that the aspect in which the chargeable polymer resin is not coated also corresponds to the present invention.
  • the chargeable polymer resin may be one in which the resin itself has chargeability, charged with charge by adding an additive to the resin, or charged with resin by water treatment.
  • Such a chargeable polymer resin has a triboelectric coefficient in the range of positive charge affinity value of +30 nC / J or higher or negative charge affinity value of -30 nC / J or lower. Can be.
  • Non-limiting examples of the chargeable polymer resin usable in the present invention include polyvinyl chloride (PVC, triboelectric coefficient -100nC / J), polypropylene (Polypropylene, triboelectric coefficient -90nC / J), polyamide (Polyamide, friction) Electrical coefficient + 30nC / J), polyethylene terephtalate (polyethylene terephtalate, triboelectric coefficient -40nC / J), but are not limited thereto. Since polyvinyl chloride is charged only by friction with air without an additive, it is preferable for the purpose of the present invention to block fine dust or yellow sand.
  • PVC polyvinyl chloride
  • polypropylene Polypropylene, triboelectric coefficient -90nC / J
  • polyamide Polyamide, friction
  • polyethylene terephtalate polyethylene terephtalate, triboelectric coefficient -40nC
  • the fibers constituting the filament yarn and the chargeable polymer resin may be manufactured so that the fibers occupy 40% to 60% of the filament yarn thickness to satisfy appropriate mechanical strength and electrostatic collection. That is, the ratio of the fiber: chargeable polymer resin in the thickness is 4: 6 to 6: 4.
  • the filament has a total glass thickness of 0.24 mm and a polyvinyl chloride thickness of 0.16 mm. It may be made of yarn or glass fiber thickness of 0.2 mm and polyvinyl chloride of 0.3 mm can be made of filament yarn of a total thickness of 0.5 mm.
  • One surface of the chargeable mesh substrate is laminated with a nanofiber web layer 51 having nanofibers spinning and having a web shape.
  • the nanofibers may be formed to have a diameter of 500 nm to 1.5 ⁇ m, preferably 0.7 ⁇ m to 1.0 ⁇ m, for physical collection of fine dust and / or yellow sand. If the diameter of the nanofibers is less than 500 nm, the durability against external magnetic poles is insufficient, and if the diameter of the nanofibers is larger than 1.5 ⁇ m, the size of the pores formed in the nanofiber web layer 51 becomes too large, and the fine dust trapping ability is significantly reduced.
  • the nanofiber web layer 51 formed from the nanofibers may be spun at 0.1 to 2 g / m 2, preferably 0.5 to 1 g / m 2 basis weight.
  • the nanofiber web layer 51 has a basis weight of less than 0.1 g / m 2, the amount of the nanofiber web layer 51 is small so that the size of the filter hole becomes large, so that fine dust cannot be effectively collected. That is, it becomes difficult to collect fine dust, such as '1' shown in FIG.
  • the nanofiber web layer 51 has a basis weight of more than 2 g / m2, the light transmittance is lowered, so that the proper visible light transmittance is not secured, so when using a multi-layered planar filter employing such a nanofiber web layer 51, the external perspective It also hurts the air permeability and lowers the air permeability.
  • visible light transmittance refers to the percentage of the visible light spectrum (380 to 780 nanometer wavelength range) transmitted through a multilayer planar filter, borrowing from standard ISO 9050 using simulated light type D65. Is measured. ISO 9050 is for glass windows, but the same procedure can be applied to multilayer planar filters that are taped or otherwise attached to glass windows.
  • visible light transmittance refers to “visible light transmittance” when the visible light transmittance measured as described above is 40% or more.
  • the nanofiber web layer 51 may have a form in which a polymer resin having a dipole moment of 2.0 D or more is melt spun or the polymer resin is dissolved in a predetermined organic solvent and spun.
  • Non-limiting examples of polymer resins having a dipole moment of 2.0 D or more include polyacrylonitrile (3.6D), polyvinylpyrrolidone (2.3D), and polyvinylidene fluoride (PVDF, 2.1D). Compounds such as, but are not limited thereto.
  • polymer resins such as polytetrafluoroethylene (1.6D), polyvinyl alcohol (1.2D), and polypropylene (0.7D) have a dipole moment of less than 2.0 D, and thus are used as nanofiber web layers in the present invention. This may require a separate treatment.
  • the organic solvent dissolving the polymer resin is selected from the group consisting of dimethylacetamide (DMAC), dimethyl sulfoxide (DMSO) and acetone.
  • DMAC dimethylacetamide
  • DMSO dimethyl sulfoxide
  • acetone One or more solvents may be mentioned, but are not limited thereto.
  • the nanofibers may be present in the form of a web on the chargeable mesh substrate 50 made of filament yarn, and may also exist in the mesh eye formed by the filament yarn to physically collect fine dust and / or yellow sand.
  • the protective mesh 53 has a mesh structure knitted or woven by monofilament yarn, and the unit mesh constituting the mesh structure has a polygonal structure of hexagonal shape or more.
  • the protective mesh 53 is laminated on the nanofiber web layer 51 to prevent the nanofiber web layer 51 from being detached and to improve the wear strength of the multilayer flat filter.
  • the protective mesh 53 may be treated to have chargeability to assist in collecting fine dust and / or yellow sand.
  • the protective mesh 53 is knitted or woven into monofilament yarns.
  • the protective mesh 53 is knitted or woven using braid, a problem may arise in that the braided yarn is peeled off while the multilayered planar filter is in use.
  • the monofilament yarn has a smaller surface area than that of the coarse yarn, the adhesion between the electrostatic mesh substrate 50 and the nanofiber web layer 51 is weaker than that of the coarse yarn. It can be made in the shape of a cross-sectional shape such as the cross section to complement the adhesion of the monofilament yarn.
  • the monofilament yarns constituting the protective mesh 53 may be made from at least one selected from the group consisting of synthetic fibers, for example, polyolefins, polyesters and polyamides, which are easily charged with static electricity.
  • the monofilament yarn may have a thickness of 1 to 100 ⁇ m and may be woven or knitted to have an eye size of 10 to 30 mesh, but the thickness and eye size are not limited thereto.
  • the unit mesh constituting the protective mesh 53 may have a polygonal shape of hexagon or more.
  • the nanofiber web layer 51 is located between the chargeable mesh substrate 50 and the protective mesh 53, but the nanofiber web layer 51 is formed of very thin nanofibers and Since the basis weight is also relatively small, the protective mesh 53 has a portion in direct contact with not only the nanofiber web layer 51 but also the chargeable mesh substrate 50.
  • the protective mesh 53 is charged. It is preferable to adhere firmly to the mesh mesh substrate 50 and the nanofiber web layer 51. Therefore, it is necessary to increase the area where the protective mesh 53 is in contact with the nanofiber web layer 51 and the chargeable mesh substrate 50.
  • the contact with the protective mesh 53 per mesh of the chargeable mesh base 50 is 6 Since more than two structures can be obtained, adhesive strength becomes high. As a result, efficient management of the multilayered planar filter is possible.
  • the protective mesh 53 can also be treated to be chargeable.
  • the monofilament yarn used in the protective mesh 53 may be treated with an electrostatic material in advance, or the electrostatic material may be treated with the protective mesh 53 knitted or woven with the monofilament yarn.
  • electrostatic materials include Calixarenes.
  • the above-described fine dust blocking visible light-transmitting multilayer structure planar filter according to an embodiment of the present invention in which the above-mentioned electrified mesh substrate 50, nanofiber web layer 51, and protective mesh 53 are sequentially stacked, from above
  • FIG. 1 the chargeable mesh substrate 50 is made in the form of a grid mesh
  • the nanofiber web layer 51 is radiated in a random form thereon
  • the protective mesh 53 is located. 2 is not drawn in proportion to the actual dimensions for easy understanding, and for an image of the first visible visible light transmissive multilayer structure planar filter according to an embodiment of the present invention, see FIG. 3 and the description thereof. do.
  • a binder may be applied, thermally fused, or both to ensure that the protective mesh 53 is more firmly adhered to the chargeable mesh substrate 50 and the nanofiber web layer 51.
  • the binder may be applied or applied to all or part of the nanofiber web layer 51 in contact with the protective mesh 53.
  • binders that can be used include, but are not limited to, organic binders such as polyurethane, acrylic, rubber, polyvinylidene fluoride and inorganic binders such as aluminum phosphate. It is preferable to use an organic binder for the same kind of material as the nanofiber web layer.
  • Thermal fusion may be performed after the protective mesh 53 is laminated on the nanofiber web layer 51. Thermal fusion may be applied to all or a portion of the nanofiber web layer 51 in contact with the protective mesh 53.
  • Visible dust-transmitting multilayer filter plane filter of the present invention having the above-described structure, the (S1) preparing a chargeable mesh substrate; (S2) forming a nanofiber web layer; And (S3) nanofiber web layer protection step; may be obtained by a process comprising, but is not limited thereto. It looks at each of the above steps below.
  • fibers are coated with a chargeable polymer resin to obtain filament yarns and the filament yarns are knitted or woven to provide a chargeable mesh substrate.
  • polymer resins and filament yarns used in this step see the above description.
  • nanofibers are spun on the surface of the chargeable mesh substrate to form a nanofiber web layer.
  • Methods of spinning nanofibers to form nanofiber web layers are well known.
  • the nanofiber web layer may be melted by dissolving the polymer resin or by dissolving the polymer resin in an organic solvent and spinning by electrospinning, flash spinning, or rotary force spinning, but is not limited thereto. In particular, it is preferable to radiate directly on the chargeable mesh substrate from the electrospinning apparatus.
  • a binder may be applied onto the nanofiber web layer as necessary.
  • the binder application method is not particularly limited and may be applied, for example, through a nozzle placed on the nanofiber web layer.
  • the fibers constituting the protective mesh and the electrostatic material used for the protective mesh treatment, refer to the above description.
  • the electrostatic material may be treated with the filament yarn before the monofilament yarns are woven or knitted with the protective mesh or after the monofilament yarns have been woven or knitted.
  • Such electrostatic materials may be treated to monofilament yarns by methods such as coating, spraying, dipping and the like.
  • the laminate composed of the electrostatic mesh substrate, the nanofiber web layer, and the protective mesh 53 formed as described above is press-bonded using a roller capable of applying heat and pressure as necessary to form a multilayered planar filter according to the present invention. Can be.
  • Polyvinyl chloride was coated on the glass fibers to produce a filament yarn having a diameter of 0.4 mm, thereby preparing a charged mesh substrate having an eye size of 20 mesh at a basis weight of 150 g / m 2.
  • the total thickness of the filament yarn was made of 40% glass fiber and 60% polyvinyl chloride.
  • a polyvinylidene fluoride is prepared by dissolving polyvinylidene fluoride in a 50:50 wt% mixed solvent of dimethylformamide and acetone, and then spun at 1.5 g / m 2 basis weight on the chargeable mesh substrate through an electrospinning method. A web layer was formed.
  • the polyurethane was then spray coated onto the nanofiber web layer in an amount of 1 g / m 2 with a binder.
  • the protective mesh is knitted in a mesh structure so that the unit mesh has a hexagonal shape and laminated on a nanofiber web layer Passing through the fusion roller to prepare a planar filter that can be protected both sides of the nanofiber web with a chargeable mesh substrate and a protective mesh.
  • the filter was prepared in the same manner.
  • Filters were prepared in the same manner as in the above example except that the protective mesh was not laminated.
  • the filter was prepared in the same manner except that the protective mesh was not laminated and the basis weight of the nanofiber web layer was 3 g / m 2.
  • the filter was prepared in the same manner as in the above example except that the protective mesh was laminated with a square mesh instead of a hexagonal mesh.
  • FIG. 3 The SEM image of the visible light-transmissive multilayer structure planar filter prepared in the example is shown in FIG. 3.
  • a very thin nanofiber web layer (B) is spun in a spider web form on a chargeable mesh substrate (A) made of filament yarn formed by coating a chargeable polymer resin on a fiber.
  • the protective mesh (C) is made from monofilament yarn so that the unit mesh has a hexagonal shape, and is radiated onto the nanofiber web layer (B).
  • the protective mesh (C) is present on the nanofiber web layer (B), but since the fibers constituting the nanofiber web layer are used in a very thin and relatively small basis weight, the protective mesh (C) is also used for the chargeable mesh substrate (A).
  • the protective mesh (C) ensures a constant adhesive force not only for the nanofiber web layer (B) but also for the chargeable mesh base material (A).
  • the hexagonal unit mesh constituting the protective mesh (C) is in contact with the chargeable mesh substrate (A), that is, increase the contact to secure a certain level of adhesion.
  • FIG. 4 is an SEM image photographed at a higher magnification than in FIG. 3, showing a fine dust-blocking visible light-transmitting multilayer structure flat filter of an embodiment. 4, the form in which the fine dust is physically collected in the nanofiber web layer (circle denoted as '1') and the form in which the fine dust is electrostatically collected in the nanofiber web layer (circle denoted '2'). You can check.
  • the fine dust physically collected in the nanofiber web layer may be relatively large fine dust, for example, fine dust having a size of about 20 ⁇ m.
  • the fine dust that is electrostatically trapped in the nanofiber web layer may be relatively small fine dust, such as fine dust of about 3 ⁇ m in size.
  • the dust collection efficiency, air permeability, wear strength and peel strength of the Examples and Comparative Examples were measured in order to evaluate the performance and durability of the particulate filter for blocking the visible light-transmitting multilayer structure manufactured in Examples and Comparative Examples.
  • air permeability was measured using JIS L 1096 method, and the filter was measured at a pressure of 125 Pa in an area of 38 cm 2.
  • Dust collection efficiency was measured with wind speed of 1m / s using ASHRAE STANDARD 52.1.
  • the wear strength was measured by applying option 1 of the Martindale test method to the occurrence of puncture in the nanofiber web and more than 50% damage. Each test result is shown in Table 1.
  • Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Air permeability (cm 3 / cm 2 / s) 413 408 405 409 269 397 Dust collection efficiency (%) 92 89 88 83 92 88 Visible light transmittance (% T) 42.6-49.6 41.5 ⁇ 49.3 42.1-49.4 44.3 ⁇ 51.2 29.8-30.2 43.1-49.3 Wear strength (times) 151 81 134 4 7 58
  • Example 1 shows that the example using the glass fiber coated with polyvinyl chloride significantly increased the wear strength as compared with Comparative Example 1 not.
  • Example 2 Comparing Example 2 and Comparative Example 2, it is shown that the Example using the glass fiber coated with polyvinyl chloride increased the dust collection efficiency compared to Comparative Example 2 not.
  • Comparing Example 3 and Comparative Example 3 it is shown that the example in which the nanofiber web layer is protected by the protective mesh has a significant increase in wear strength compared to Comparative Example 3, which is not.
  • planar filter for preventing fine dust of a highly durable multilayer structure applying simultaneous electrostatic collection and physical collection is for illustration as described above, and the embodiments are all or part so that various modifications can be made. May optionally be combined.

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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

L'invention concerne un filtre planaire multicouche permettant de transmettre une lumière visible capable de bloquer des particules fines, et un procédé de fabrication associé, le filtre planaire multicouche comprenant de manière séquentielle : un substrat à maille chargée tricotée ou tissée avec un fil de filament formé par revêtement d'une résine polymère chargée sur une fibre ; une couche de toile de nanofibres filée et stratifiée sur une surface du substrat ; et une maille de protection ayant une structure de maille tricotée ou tissée avec un fil de monofilament, la structure de maille étant formée de mailles unitaires ayant une structure polygonale qui a au moins six angles, et par conséquent, à la fois la collecte électrostatique par le substrat à maille chargée et la collecte physique par la couche de toile de nanofibres se produisent de façon permettant de maximiser le filtrage de particules fines et/ou de poussière jaune, de telle sorte qu'une excellente propriété de blocage de particules fines est obtenue même si un poids de base plus petit de la couche de toile de nanofibres est utilisé, et une transmission de lumière visible suffisante est assurée en raison d'une haute transmittance de lumière de telle sorte qu'un champ de vision depuis l'extérieur n'est pas entravé.
PCT/KR2019/002436 2018-03-15 2019-02-28 Filtre planaire multicouche ayant une transmittance de lumière visible et une haute durabilité, permettant de bloquer des particules fines en appliquant simultanément une collecte électrostatique et une collecte physique, et procédé de fabrication associé Ceased WO2019177289A1 (fr)

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KR102120564B1 (ko) * 2018-11-23 2020-06-16 정승혁 나노파이버웹을 영상맺힘 매개체로 이용하는 반투과형 양면스크린 및 그 제조방법
KR102229668B1 (ko) * 2019-01-11 2021-03-19 충남대학교산학협력단 재사용 가능한 미세먼지 포집용 필터 및 이의 제조방법
KR102129418B1 (ko) * 2019-04-03 2020-07-03 유해경 나노섬유를 구비한 미세먼지 차단 필터 및 이의 제조방법
KR102010953B1 (ko) * 2019-04-10 2019-08-14 주식회사 티엔솔루션 공기투과도가 우수한 초미세먼지 방진 나노섬유 복합메쉬
KR102039704B1 (ko) * 2019-06-14 2019-12-03 김상윤 미세먼지 차단용 가시광선 투과성 다층구조의 평면 필터 제조장치 및 제조방법
KR102660133B1 (ko) * 2020-03-11 2024-04-24 최광현 정전기를 이용한 미세먼지 및 바이러스 차단용 구조체 및 이를 구비한 물품
KR102614920B1 (ko) * 2020-05-13 2023-12-15 세종대학교산학협력단 미세먼지 포집용 에어필터
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KR102319116B1 (ko) * 2021-01-25 2021-10-28 강태순 미세먼지 방지망
KR20240119892A (ko) 2023-01-30 2024-08-07 주식회사 넥스트이앤엠 방풍 및 방음벽 겸용 도로 미세먼지 저감장치

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