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公开(公告)号：US11478734B2
公开(公告)日：2022-10-25
申请号：US16470199
申请日：2017-12-13
发明人： In Yong Seo , Ui Young Jeong
摘要： A filter medium is provided. The filter medium according to an embodiment of the present invention comprises: a first support body having a plurality of pores; a nanofiber web comprising nanofibers disposed on upper and lower sides of the first support body and forming a three dimensional network structure; and a second support body having a plurality of pores interposed between the first support body and the nanofiber web, wherein the nanofiber web is realized as a filter medium that satisfies: (1) an elongation of 25% or more, (2) an air permeability of 0.1 to 2.00 cfm, and 3) porosity of 60%˜85%. Accordingly, since the filter medium has a fixed level of mechanical properties of the nanofiber web, the shape, structure deformation, and damage of the filter medium are minimized and a flow path is smoothly secured during a water treatment operation so that the filter medium can have a high flow rate. In addition, since the filter medium of the present invention has a prolonged use life due to excellent durability of the filter medium even at high pressure applied during backwashing, and has excellent filtration efficiency and water permeability, the filter medium can be applied in various ways in various water treatment fields.
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公开(公告)号：US10751662B2
公开(公告)日：2020-08-25
申请号：US15572351
申请日：2016-05-18
发明人： In Yong Seo , Ui Young Jeong
IPC分类号： B01D39/00 , B01D46/52 , B01D53/00 , B01D53/04 , B01D53/22 , B01D39/08 , B01D39/16 , B01D67/00 , B01D69/12 , B01D69/10 , B01D69/02 , B01D71/02
摘要： Provided is a gas filter, which includes an adsorptive membrane for adsorbing foreign substances contained in a gas, wherein the adsorptive membrane has a corrugated structure folded in a number of times or a structure having a plurality of projections, in order to increase a contact surface area of the gas per unit area, and wherein the adsorptive membrane includes: a support member having a plurality of first pores; and a first adsorptive member which is stacked on the support member and has a plurality of second pores formed therein and which is made by accumulating ion exchange nanofibers for adsorbing foreign substances.
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公开(公告)号：US11633701B2
公开(公告)日：2023-04-25
申请号：US16470201
申请日：2017-12-14
发明人： In Yong Seo , Ui Young Jeong
IPC分类号： B01D65/08 , B01D63/08 , B01D65/02 , B01D69/06 , B01D67/00 , C02F1/44 , B01D69/02 , B32B5/02 , B32B5/26 , B32B37/18 , B32B37/02 , B01D71/32
摘要： A filter medium according to one embodiment of the present invention comprises: a first support having a plurality of pores; a nanofiber web comprising nanofibers disposed on upper and lower portions of the first support and forming a three-dimensional network structure, and a hydrophilic coating layer formed on at least a part of an outer surface of the nanofibers, wherein the hydrophilic coating layer is formed of a hydrophilic coating composition comprising a hydrophilic polymer compound having at least one functional group selected from a hydroxyl group and a carboxyl group and a crosslinking agent comprising at least one sulfone group; and a second support having a plurality of pores interposed between the first support and the nanofiber web.
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公开(公告)号：US11192098B2
公开(公告)日：2021-12-07
申请号：US15760440
申请日：2016-09-19
发明人： Ui Young Jeong
IPC分类号： B01J47/127 , H01M50/44 , H01M50/403 , H01M50/411 , H01M50/449 , C08L101/00 , D04H1/728 , B01D69/02 , C08J5/22 , B01D67/00 , B01D69/12 , B01D69/10 , H01M8/0221 , C02F1/469 , B01D71/34
摘要： A method for manufacturing an ion exchange membrane is provided. The method for manufacturing an ion exchange membrane, according to one embodiment of the present invention, comprises the step of electrospinning a support fiber producing solution and an ion exchange fiber producing solution respectively to prepare a laminate in which a support fiber mat consisting of a support fiber and an ion exchange fiber mat consisting of an ion exchange fiber are alternatively laminated. According to the present invention, it is possible to simply control factors, such as the thickness, electroconductivity and mechanical strength of the membrane, and the diameter/ratio of a pore, etc. to be suitable for the use of ion exchange membrane during the manufacturing process, to simplify the manufacturing process. As such, the ion exchange membrane manufactured by the method can be utilized as a universal ion exchange membrane which has a large ion exchange capacity, a small electrical resistance, and a small diffusion coefficient as well as excellent mechanical strength and durability.
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公开(公告)号：US11528833B2
公开(公告)日：2022-12-13
申请号：US16468894
申请日：2017-12-12
发明人： In Yong Seo , Ui Young Jeong , Jun Woo Lee
摘要： Electromagnetic wave shielding material including a conductive fiber web with multiple pores and a heat dissipation unit provided in at least some pores that is so excellent in flexibility, elasticity, and creasing/recovery that it can be changed in shape freely and brought in complete contact with a surface where the material is to be disposed even if the surface has a curved shape, uneven portions, or stepped portions, thus exhibiting excellent electromagnetic wave shielding performance and prevent deterioration thereof despite various shape changes. Since heat dissipation performance is excellent, heat generated in an electromagnetic wave source can be rapidly conducted and released. Even if parts are provided in a narrow area at high density, the material can be brought in close contact with mounted parts by overcoming a tight space between the parts and a stepped portion. The invention is employed for light, thin, short, and small or flexible devices.
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公开(公告)号：US11364470B2
公开(公告)日：2022-06-21
申请号：US16632630
申请日：2018-07-23
发明人： Ui Young Jeong , In Yong Seo
IPC分类号： B01D63/00 , B01D63/08 , B01D69/02 , B01D69/06 , B01D69/10 , B01D71/34 , D04H1/728 , B01D67/00
摘要： A filter medium including: a porous first support; nanofiber webs respectively stacked at the upper and lower parts of the first support, and made of a plurality of nanofibers of which the diameters have a standard deviation of 300 nm or less; and a porous second support interposed between the first support and the nanofiber web. The filter medium is implemented by fibers having uniform diameters, and thus is easily manufactured to have a predetermined pore diameter and simultaneously has excellent uniformity of the pore diameters, thereby having excellent filtering efficiency and being more suitable when selectively separating specific objects. Backwashing is enabled at uniform pressure during backwashing such that high cleaning power is obtained. The filter medium has excellent water permeability and excellent mechanical strength so as to minimize the shape and structural deformation and damage of the filter medium.
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公开(公告)号：US10695486B2
公开(公告)日：2020-06-30
申请号：US15767887
申请日：2016-10-14
发明人： In Yong Seo , Ui Young Jeong
摘要： A liquid drug-filtering filter medium is provided, which can include a nanofiber web having a three-dimensional network structure for filtering foreign substances included in a liquid drug. According to the embodiment, the occurrence of differential pressure when drawing in and filtering a liquid drug is minimized, and thus the liquid drug may be quickly drawn into a syringe cylinder within a short time and by applying small force, and at the same time, the filtration rate of foreign substances in the liquid drug is very outstanding. A method for producing the liquid drug-filtering filter medium is also provided, which enables the very easy adjustment of a pore structure of the filter medium or the diameters of the pores in order to enable the pore structure to minimize the occurrence of differential pressure or change the differential pressure to a target level.
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公开(公告)号：US10682613B2
公开(公告)日：2020-06-16
申请号：US15570853
申请日：2016-05-18
发明人： In Yong Seo , Ui Young Jeong
IPC分类号： B01D63/06 , B01D35/02 , B01D39/08 , B01D39/16 , B01D39/20 , B01D71/02 , B01D71/06 , B01J47/12
摘要： Provided is an adsorptive liquid filter including: a support tube having a hollow portion formed in a tubular shape and having a plurality of throughholes penetrating the hollow portion from an outer circumferential surface thereof; and an adsorptive membrane which is enclosed by the outer circumferential surface of the support tube and adsorbs foreign substances contained in contaminated liquid, the adsorption membrane including: a support member having a plurality of first pores; and a first adsorptive member which is stacked on the support member and has a plurality of second pores formed therein and is made by accumulating ion exchange nanofibers for adsorbing foreign substances.
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公开(公告)号：US11207644B2
公开(公告)日：2021-12-28
申请号：US16469723
申请日：2017-12-14
发明人： In Yong Seo , Ui Young Jeong
摘要： A filter medium is provided. The filter medium according to an embodiment of the present invention comprises a second support body and a nanofiber web layer which are sequentially stacked on each of both surfaces of a first support body, and is a filter medium having a flow path through which a filtrate filtrated in the nanofiber web flows in the direction of the first support body, wherein the nanofiber web has a basis weight of 30 g/m2 or less, the first support body has a basis weight of 250 g/m2 or more, and a thickness of 90% or more of the total thickness of the filter media. Accordingly, even in a backwash process performed at high pressure, as the shape, structural deformation, and damage of the filter medium can be minimized, the use period can be extended. In addition, as the flow path is smoothly secured at high pressure applied at the time of filtration and/or backwashing, the filtration water is quickly discharged to the outside from the inside of the filter medium or the backwashing efficiency is very excellent, and accordingly it is possible to be applied in various ways in various water treatment fields.
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公开(公告)号：US10945358B2
公开(公告)日：2021-03-09
申请号：US16468801
申请日：2017-12-12
发明人： In Yong Seo , Ui Young Jeong , Jun Woo Lee
摘要： Provided is a flexible electromagnetic wave shielding material. An electromagnetic wave shielding material according to an embodiment of the present invention is implemented to include a conductive fiber web including a conductive composite fiber including a metal shell part covering an outside of a fiber part such that the conductive composite fiber forms multiple pores; and a first conductive component provided in at least some of the pores. The electromagnetic wave shielding material is so excellent in flexibility, elasticity, and creasing/recovery that the electromagnetic wave shielding material may be freely changed in shape, and can be brought in complete contact with a surface where the electromagnetic wave shielding material is intended to be disposed even if the surface has a curved shape such as an uneven portion or a stepped portion, thus exhibiting excellent electromagnetic wave shielding performance. Also, it is possible to prevent deterioration of the electromagnetic wave shielding performance even with various shape changes. Furthermore, even if parts are provided in a narrow area at a high density, the electromagnetic wave shielding material can be brought into complete contact with the mounted parts by overcoming a tight space between the parts and a stepped portion. Thus, the present invention can be easily employed for a light, thin, short, and small or flexible electronic device.
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