WO2021085601A1 - Filtre pour filtration de liquides - Google Patents

Filtre pour filtration de liquides Download PDF

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Publication number
WO2021085601A1
WO2021085601A1 PCT/JP2020/040811 JP2020040811W WO2021085601A1 WO 2021085601 A1 WO2021085601 A1 WO 2021085601A1 JP 2020040811 W JP2020040811 W JP 2020040811W WO 2021085601 A1 WO2021085601 A1 WO 2021085601A1
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WO
WIPO (PCT)
Prior art keywords
warp
filter
weft
woven fabric
water
Prior art date
Application number
PCT/JP2020/040811
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English (en)
Japanese (ja)
Inventor
宮本竜馬
水野耀介
花田茂久
山村剛平
Original Assignee
東レ株式会社
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Publication date
Application filed by 東レ株式会社 filed Critical 東レ株式会社
Priority to CN202080075409.3A priority Critical patent/CN114630702A/zh
Priority to JP2021519185A priority patent/JP7021719B2/ja
Publication of WO2021085601A1 publication Critical patent/WO2021085601A1/fr

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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
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • 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
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2031—Metallic material the material being particulate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28028—Particles immobilised within fibres or filaments
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • 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
    • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents

Definitions

  • a filter in which a woven fabric made of a fibrous adsorbent on which a metal hydroxide capable of adsorbing the component is immobilized is laminated has been proposed.
  • a method of supporting it not only on the surface of the fiber base material but also on the inside has been proposed.
  • a cation exchange group is graft-polymerized on an organic polymer fiber to form a polymer compound layer having a cation exchange group on the outer periphery of the organic polymer fiber, and the polymer compound layer having the cation exchange group is formed.
  • a woven fabric or a non-woven fabric made of anion-adsorbing fibers carrying a metal hydroxide.
  • Patent Document 2 discloses a woven fabric made of deodorant fibers in which a resin layer containing a metal oxide is formed around the base fibers.
  • Patent Document 3 describes a fibrous adsorbent having a resin layer containing metal particles capable of removing arsenic contained in groundwater, phosphorus contained in wastewater, fluorine, boron contained in seawater, and the like.
  • a filter made of woven fabric or knitted fabric and surrounded by a perforated core material, which defines and discloses variations in fiber diameter, porosity, and porosity.
  • An object of the present invention is to provide a fibrous adsorbent that has a large amount of metal oxide capable of adsorbing components dissolved in water and that the supported metal oxide can effectively contribute to adsorption. It is an object of the present invention to provide a filter which can obtain a high removal rate and a long filtration life by adopting a woven structure.
  • the filter of the present invention A liquid filtration filter including a perforated core material and a woven fabric surrounded by the outer circumference of the perforated core material.
  • the warp and the weft include a multifilament containing 7 to 700 single yarns having a diameter of 1 ⁇ m to 100 ⁇ m, and the single yarns contained in the warp and the weft are thick in each cross section perpendicular to the longitudinal direction of the warp and the weft. There are three or more laminated parts in the direction, and the aspect ratio of the cross section of the warp and weft is 1.5 to 10.
  • the total cover factor of the warp and weft is 1200 or more and 2200 or less.
  • At least one of the warp or weft contains, as the single yarn, a fibrous adsorbent having a layer of a polymeric compound having an ion exchange group; metal particles supported on at least the surface of the layer (c).
  • the amount of the metal particles supported is 5 to 60% by mass with respect to the mass of the woven fabric.
  • the gaps between the fiber bundles constituting the woven or knitted fabric are not formed, the gaps between the single yarns are secured, and the raw water is prioritized on the surface of each single yarn. Because the contact area with the raw water is large and the adsorption rate is high, the removal rate is high as a result, and the metal oxide supported inside the single yarn can also effectively contribute to the adsorption. In addition, the filtration life is extended.
  • the flow of raw water between the single yarns, not between the fiber bundles causes an appropriate water flow resistance in the adsorption layer when the raw water is wound around the effective core material and used as a filter, and the effective core of the filter. Since the flow rate is less likely to be uneven in the axial direction of the material and the adsorbent in the filter is used uniformly, the filtration life is improved.
  • the filter in the present embodiment includes a perforated core material and a woven fabric wound around the perforated core material.
  • the perforated core material (hereinafter, simply referred to as “core material”) is a hollow cylinder, at least one end thereof is open, and a plurality of holes are provided on the side surface thereof.
  • core material for example, a synthetic resin is applied, and specifically, polyolefins such as polyethylene and polypropylene, or fluororesins such as PTFE and PFA are suitable.
  • the diameter (outer diameter) of the core material is preferably 5 mm or more or 8 mm or more, and preferably 50 mm or less or 30 mm or less.
  • the length of the core material is not particularly limited, but is, for example, 80 mm or more and 500 mm or less.
  • the woven fabric that is wrapped is called a wrapping body. It is preferable that the end in the winding direction of the woven fabric is fixed to the outer peripheral surface of the surrounding body by welding, adhesion, or the like.
  • the filter has a circular plate or the like on the end face, or has an end face for the purpose of preventing a short path of raw water from the end face of the winding body (the end face in the height direction of the surrounding body if the surrounding body is columnar). It is preferably sealed with an adhesive.
  • the adhesive is not particularly limited, and examples thereof include an epoxy resin adhesive, a silicone resin adhesive, and a urethane resin adhesive.
  • the filter 16 of FIG. 1 has a core material 13 and a woven fabric 11.
  • the core material 13 is a hollow member having an open top and a closed bottom.
  • a plurality of holes 14 are provided on the side surface of the core material 13.
  • the wrapping body 10 is formed by wrapping the woven fabric 11 around the core material 13.
  • the filter 16 is housed in the casing 17.
  • the casing 17 is configured so that the supply water enters the inside of the core material 13 through the opening at the upper part of the core material 13 by providing a water supply port (not shown) which is an opening at the upper portion thereof. There is.
  • An intake port (not shown), which is an opening, is also provided at the bottom of the casing 17, so that permeated water flows out of the filter from the water intake port.
  • the flow of water is drawn so as to go from the inside to the outside of the surrounding body 10 in FIG. 1, the flow of water may be reversed. That is, it is also possible to supply water to the side surface of the winding body and collect the permeated water from the core material.
  • a supply port capable of supplying water between the surrounding body 10 and the inner wall of the casing 17 is provided at the lower part, and the permeated water is permeated through the opening at the upper part of the core material 13.
  • a casing may be used that has an intake port at the top so that the water can be taken out.
  • a wrapping body is a woven fabric that is wrapped around a core material.
  • the outer shape of the winding body corresponds to the outer shape of the core material in many cases, but it can be adjusted by the shape of the woven fabric, the number of times of winding, etc.
  • As the outer shape of the surrounding body various shapes such as a cylinder; a prism such as a triangular prism or a quadrangular prism; a cone; a pyramid such as a triangular pyramid or a quadrangular pyramid; or a sphere or an elliptical sphere can be adopted.
  • Woven fabrics are fabrics having warp threads and weft threads that intersect each other, and examples thereof include three original structures such as plain weave, twill weave, and satin weave, and their modified structures.
  • Examples of the changing structure include the ridge weave and the satin weave, which are the changing structures of the plain weave, and the twill twill, the French twill weave, the bent twill weave, the torn twill weave, and the steep twill weave.
  • irregular twill weave, layered satin weave, wide twill weave, mikage satin weave, blurred satin weave, and day and night satin weave are examples.
  • woven fabric having these weaving structures can be woven by a normal method using a normal loom such as a rapier loom or an air jet loom.
  • a twill weave or a twill weave with few intersections is preferable, and a satin weave or a satin weave change structure is more preferable.
  • the woven fabric has multifilaments as warp and weft.
  • the multifilament contains 7 to 700 single yarns with a diameter of 1 ⁇ m to 100 ⁇ m.
  • In each cross section perpendicular to the longitudinal direction of the warp and the weft there is a place where three or more single yarns contained in the warp and the weft are laminated in the thickness direction of the woven fabric (vertical direction in FIG. 3), and the warp is
  • the aspect ratio of the cross section of the weft is 1.5 to 10, preferably 1.7 to 5, and more preferably 1.7 to 4.
  • the woven fabric 11 of FIG. 2 has a warp 31 and a weft 32, and each of the warp 31 and the weft 32 is a multifilament.
  • the warp and weft in the woven fabric 11 do not have to be all multifilaments, and some of them may be monofilaments.
  • the warp 31 or the weft 32 which is a multifilament does not have to have the same structure and composition, and the woven fabric 11 may contain a plurality of types of multifilaments having different structures or compositions.
  • the single yarns constituting one multifilament do not have to have the same structure and composition, and the multifilament may include a plurality of single yarns having different structures or compositions.
  • FIG. 3 shows the AA cross section, and the illustration and description of the BB cross section are omitted.
  • the warp 31 includes a plurality of single yarns 4.
  • the aspect ratio of the warp 31 is represented by its thickness H and width L to L / H. The same applies to the weft thread 32.
  • the aspect ratio of the cross section of the warp and weft is 1.5 or more, the raw water permeates uniformly between the single yarns, and the removal rate and the filtration life are improved.
  • the aspect ratio of the cross section of the warp and the weft is 10 or less, the misalignment of the woven fabric is suppressed, and the voids are evenly distributed in the winding body, so that the removal rate and the filtration life are improved.
  • the diameter of the single yarn 4 constituting the warp and weft is 1 ⁇ m or more, a gap having an appropriate width is generated between the single yarns. Due to the presence of this gap, raw water can be preferentially passed between the single yarns rather than between the multifilaments. Since the metal oxide supported inside the single yarn near the center of the fiber bundle can efficiently contribute to the adsorption of the target substance, a high removal rate of the target substance and a long filtration life are realized. it can.
  • the diameter d of the single yarn is preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more.
  • the single yarn diameter d is 100 ⁇ m or less, preferably 60 ⁇ m or less, and more preferably 45 ⁇ m or less.
  • the single yarn diameter d is 100 ⁇ m or less, the area where the single yarn comes into contact with the raw water can be increased, and the adsorption rate can be increased. Further, since the metal oxide supported on the inside of the single yarn can efficiently contribute to the adsorption of the target substance, the life of the filter can be extended.
  • the number of single yarns constituting the warp and weft is 7 or more, preferably 12 or more, and more preferably 24 or more.
  • 7 or more yarns it is possible to reduce the number of warp yarns and weft yarns per inch required for uniform permeation of raw water between single yarns, and as a result, the number of intersections of warp yarns and weft yarns is reduced. Since the contact area with raw water can be increased and the metal oxide supported inside the single yarn near the center of the fiber bundle can efficiently contribute to the adsorption of the target substance, the removal rate and the filtration life are improved. To do.
  • the number of single yarns constituting the warp and weft is 700 or less, preferably 400 or less, and more preferably 150 or less.
  • the number of yarns is 700 or less, the raw water easily flows between the single yarns instead of between the fiber bundles, and an excessive increase in pressure loss when the raw water flows between the single yarns can be reduced.
  • the warp and weft that make up the woven fabric have twists of 0 T / m or more and 100 T / m or less, more preferably 50 T / m or less, and even more preferably 10 T / m or less, respectively.
  • it is 100 T / m or less, a gap between single yarns can be secured, and when raw water is passed, water can be preferentially passed between single yarns instead of between multifilaments, and a fiber bundle can be passed. Since the metal oxide supported inside the single yarn near the center of the yarn can efficiently contribute to the adsorption of the target substance, a high removal rate of the target substance to be removed and a long filtration life can be realized.
  • each cover factor in the warp and weft is 1200 or more, more preferably 1300 or more, and further preferably 1800 or more. Further, it is preferably 2200 or less, more preferably 2100 or less, and further preferably 2000 or less.
  • the gap between the adjacent warp yarns and the gap between the adjacent weft yarns can be reduced, the raw water flows preferentially between the single yarns, and the effective core material is the same. Since it is possible to surround the woven fabric and impart an appropriate water flow resistance even when water is passed through it, non-uniformity of the flow rate is unlikely to occur, and the removal rate and the filtration life can be increased.
  • the total value of CF is 2200 or less, it is possible to secure a gap between single yarns and maintain an appropriate water flow resistance.
  • the woven fabric since the woven fabric has the above structure, raw water easily passes through the inside of the multifilament, and a filter having a high adsorption rate, a large adsorption capacity, and a long life is realized.
  • Fibrous Adsorbent At least one of the warp or weft in a woven fabric that is a multifilament contains a fibrous adsorbent as a single yarn.
  • the fibrous adsorbent adsorbs ions in the liquid. It is preferable that both the warp and the weft contain a fibrous adsorbent.
  • the multifilament containing the fibrous adsorbent may be a part or all of the warp and weft. Further, the fibrous adsorbent may be a part or all of the single yarn contained in the multifilament.
  • the single yarns constituting all the warp and weft yarns contained in the woven fabric are fibrous adsorbents, but in order to improve the strength or other performance, the woven fabric is used. It may contain a multifilament or a single yarn having no adsorptive capacity.
  • the cross-sectional shape of the fibrous adsorbent or a single yarn having no adsorption performance is not limited to a specific example, and may be circular or irregular. May be good.
  • a variant is a shape other than a circle.
  • the irregular shape is, for example, polygonal hexagon (preferably 3 to hexagonal); flat shape; lens type; the same number as a plurality of (preferably 3 to 8) convex parts called multilobes such as three leaves and hexagons.
  • a shape in which recesses are alternately arranged can be adopted.
  • a single yarn with a modified cross section has a large specific surface area. Further, in a filter including a single yarn having a modified cross section, a wide gap can be secured between the single yarns, so that the flow resistance becomes small. Further, since the contact area with the raw water is increased, high adsorption performance can be obtained.
  • the degree of deformation of the cross section is preferably 1.2 or more and 6.0 or less.
  • the degree of deformation is a value (R1 / R2) obtained by dividing the diameter R1 of the smallest circle including the cross section of the single yarn 4 by the diameter R2 of the largest circle that fits within the cross section of the single yarn 4 (FIG. 4).
  • R1 / R2 the degree of deformation
  • Fibrous adsorbents include, for example, ion exchange fibers capable of removing ions and metal particle-supporting fibers that can be removed by adsorbing inorganic ions such as boron, arsenic, phosphorus, and fluoride ions.
  • the ion exchange fiber contains a polymer compound having an ion exchange group.
  • a polymer compound having an ion exchange group has a cation exchange group such as a sulfonic acid group, a carboxy group, a phosphoric acid group or a hydroxyl group, or an anion exchange group such as a quaternary ammonium base or a tertiary amino group in the molecule.
  • a cation exchange group such as a sulfonic acid group, a carboxy group, a phosphoric acid group or a hydroxyl group
  • an anion exchange group such as a quaternary ammonium base or a tertiary amino group in the molecule.
  • the molecular chains may be cross-linked by covalent bonds at multiple points.
  • the cross-linking agent is copolymerized with a monomer having a carboxy group to suppress swelling, increase the density of cation exchange groups in the ion exchange fiber, and improve the ion exchange capacity.
  • bifunctional acrylamide examples include N, N'-methylenebisacrylamide.
  • bifunctional acrylate examples include 2-hydroxy-3-acryloyloxypropyl methacrylate, polyethylene glycol diacrylate, 1,6-hexanediol diacrylate, and the like.
  • bifunctional methacrylate examples include ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, and polyethylene glycol dimethacrylate.
  • a polymer compound having an ion-exchange group is formed, for example, by graft-polymerizing a vinyl monomer having a carboxy group with a substrate.
  • a polymer compound having a carboxy group is a compound having a plurality of carboxy groups in the molecule, and is composed of a homopolymer of acrylic acid and methacrylic acid, a copolymer, an acrylic acid ester, a methacrylic acid ester, and maleic anhydride.
  • a polymer obtained by hydrolyzing a copolymer can be mentioned.
  • the ion exchange capacity of the ion exchange fiber is preferably 1.0 meq / g or more, and more preferably 1.5 meq / g or more. When it is 1.0 meq / g or more, a life that can be practically used as an ion exchange fiber can be realized.
  • the ion exchange capacity is preferably 8.0 meq / g or less, and more preferably 6.0 meq / g or less. When the ion exchange capacity is 8.0 meq / g or less, excessive swelling of the polymer compound having an ion exchange group is suppressed, so that clogging during water flow is less likely to occur.
  • the metal particle-supporting fiber 2 contains a layer 21 of a polymer compound having an ion exchange group and metal particles 23 supported on at least the surface of the layer 21.
  • the metal particle-supporting fiber 2 may have a central base material 24.
  • the central base material 24 does not contain the metal particles 23.
  • the base material and the central base material 24 described in the description of the ion exchange fiber may be of the same type or different types, and may be, for example, a polyolefin such as polyethylene or polypropylene, a polyester such as polyethylene terephthalate or polycarbonate, or the like.
  • Synthetic fibers such as polyamide, aromatic polyamide, acrylic, polyacrylonitrile, polyvinyl chloride, PTFE, halogenated polyolefin such as polyvinylidene fluoride, and natural fibers such as wool, silk and cotton, or blended yarns or blended fibers thereof. Threads can be used.
  • polyamide and polyester are particularly preferable as the fiber structure, nylon is particularly preferable for polyamide, and polyethylene terephthalate (PET) is particularly preferable for polyester.
  • the metal particles 23 are supported on at least at least the surface of the layer 21 of the polymer compound having an ion exchange group. Further, the metal particles 23 may also be supported inside the layer 21 of the polymer compound having an ion exchange group. Since the metal particles 23 are present inside the layer 21, the mass of the metal particles 23 per unit mass of the metal particle-supporting fibers 2 is larger than that of being supported only on the surface, and the metal particles 23 are ion-exchange groups. It becomes difficult to separate from the layer 21 of the polymer compound having.
  • the metal particles 23 or their precursors are bonded to the ion exchange group so that the metal particles are efficiently supported on the layer 21.
  • the type of bond between the ion exchange group and the metal particle 23 is not particularly limited, and examples thereof include an ionic bond, a coordination bond, a metal bond, a hydrogen bond, and a van der Waals force bond.
  • the polymer compound having an ion exchange group is preferably a polymer compound having an anionic ion exchange group such as a carboxyl group, a sulfo group, or a phosphate group, and polystyrene sulfone is preferable.
  • examples thereof include acids, polyacrylic acid, polymethacrylic acid, and copolymers containing the above-mentioned polymer compound having an anionic ion exchange group.
  • the metal particles of cerium hydroxide are particularly preferable metal particles from the viewpoint of ion removal performance.
  • the functional group density C (meq / g) of the ion exchange group is preferably 0.5 (meq / g) or more, and more preferably 1.0 (meq / g) or more in the woven fabric described later. .. When it is 0.5 (meq / g) or more, the supported metal is less likely to be peeled off even when water is passed.
  • C (meq / g) is preferably 8.0 (meq / g), more preferably 5 (meq / g) or less. When it is 8.0 (meq / g) or less, excessive swelling is suppressed, so that clogging during water flow is less likely to occur.
  • C (meq / g) is measured as follows.
  • the woven fabric is immersed in a strongly acidic aqueous solution to dissolve the metal particles, the residue (fibrous structure) is washed with water, vacuum dried at 50 ° C. for 3 hours, and the absolute dry mass W (g) is measured. Then, the ion exchange capacity based on the absolute dry mass W (g) is measured with respect to the residue by a conventional method using neutralization titration, and the value is C (meq / g).
  • the metal constituting the metal particles 23 can be arbitrarily selected depending on the adsorption target.
  • the metal particles include at least one metal selected from the group consisting of silver, copper, iron, titanium, zirconium and cerium.
  • the adsorption target is boron, arsenic, phosphorus, or fluoride ion, metal oxides, metal hydroxides, and hydrates thereof can be mentioned.
  • the metal particles preferably contain at least one of a metal hydroxide and a metal hydroxide.
  • the metal hydroxide and the metal hydroxide include a rare earth element hydroxide, a rare earth element hydroxide, a zirconium hydroxide, a zirconium hydroxide, an iron hydroxide, and an iron hydroxide.
  • rare earth elements include scandium Sc with atomic number 21 and ytterbium Y with atomic number 39, and lanthanoid elements with atomic numbers 57 to 71, that is, lanthanum La, cerium Ce, praseodymium Pr, neodymium Nd, and promethium Pm.
  • cerium is preferable from the viewpoint of ion removal performance, and tetravalent cerium is more preferable.
  • a mixture of these hydroxides and / or hydroxides is also useful.
  • the water content of the metal particles is preferably 1% by mass or more, and more preferably 5% by mass or more.
  • adsorption sites can be imparted to the inside of the particles, and the particles have sufficient adsorption ability.
  • the water content is preferably 30% by mass or less, and more preferably 20% by mass or less. When the water content is 30% by mass or less, the density of the adsorption sites inside the particles can be increased, and the particles have sufficient adsorption ability.
  • the particle size of the metal particles is preferably 1 nm or more and 1000 nm or less.
  • the particle size means the particle size of the dispersed state (primary particles) if each particle is dispersed, and the agglomerated state (2) if the particles are agglomerated.
  • the particle size of the metal particles is preferably 500 nm or less, more preferably 100 nm or less, and even more preferably 50 nm or less. When the particle size exceeds 1000 nm, the number of adsorption sites existing on the outer surface of the particles is reduced, and sufficient adsorption ability cannot be exhibited.
  • the particle size of the metal particles is preferably 5 nm or more, more preferably 10 nm or more, and even more preferably 15 nm or more. Considering the aggregation of particles during the production of the adsorbent, the lower limit of the particle size is 1 nm.
  • the amount of metal particles supported in the woven fabric is 5% by mass or more, preferably 8% by mass or more, and more preferably 15% by mass or more.
  • the amount of metal particles supported is 60% by mass or less, preferably 50% by mass or less, and more preferably 40% by mass or less.
  • the amount of the metal particles carried is 60% by mass or less, it is possible to suppress the peeling of the metal particles during water flow or the clogging of the filter due to the peeling of the metal particles.
  • the method for measuring the amount of metal particles supported is shown below. First, the mass W1 of the metal particle-supporting fiber is weighed. Next, the metal particles are taken out by dissolving the adsorbent in a good solvent such as a strong alkali / strong acid aqueous solution or by combining a method of heating at 800 ° C. or higher with an electric furnace, and the mass W2 of the metal particles is weighed. The amount of the metal particles supported, that is, the mass ratio of the metal particles to the entire metal-supported fibers is (W2 / W1) ⁇ 100 (parts by mass).
  • the filter of the present invention in addition to the requirements of single yarn diameter, number of single yarns of multifilament, aspect ratio of cross section, and cover factor for the warp and weft of the woven fabric, at least one of the warp or weft of the woven fabric is ionized as a single yarn.
  • a layer of a polymer compound having an exchange group By including a layer of a polymer compound having an exchange group, the water flow resistance is greatly reduced and the filtration performance is improved.
  • the mechanism is not clear, but it is considered that the adjacent site between the single yarns is not a base material having no ion exchange group but a layer of a polymer compound having an ion exchange group.
  • Water purifier The above filters can be applied to water purifiers.
  • a water purifier is a structure that can remove target components contained in raw water. By including the above-mentioned filter, the component to be removed in the raw water can be suitably removed, and a sufficient amount of permeated liquid until it breaks can be obtained.
  • the shape of the water purifier is not limited, such as a pot type or other gravity type or faucet type. As described above, it can also be used for gravity type water purifiers and the like that require low water flow resistance.
  • the above-mentioned filter can be used alone as a water purifier or in combination with another filter or a separation membrane, such as the filter 16 shown in FIG. 1 and the casing 17 accommodating the filter 16.
  • FIG. 6 illustrates a water purifier provided with a hollow fiber membrane and a filter.
  • the water purifier 6 shown in FIG. 6 includes a filter 16, a hollow fiber membrane 62, a casing 61, and a sealing material 63.
  • the filter 16 includes a core material 13 and a winding body 10 as described above.
  • the upper part of the core material 13 is open at the upper part of the casing 61 (water supply port 611). Further, the bottom of the core material 13 and the surrounding body 10, that is, the bottom of the filter 16 is sealed by the sealing material 63. The upper part of the filter 16 is sealed by the upper lid of the casing 61.
  • the hollow fiber membrane 62 is arranged below the filter 16 in the casing 61. Both ends of the hollow fiber membrane 62 are open at the bottom of the casing 61 (water intake 612).
  • the casing 61 is a hollow columnar member as a whole, and houses the filter 16 and the hollow fiber membrane 62 inside.
  • the casing 61 has openings at the upper part and the lower part thereof, which are connected to the core material 13 and the hollow fiber membrane 62, respectively.
  • the above-mentioned filter is suitable for water purification.
  • the water purification method may include passing raw water through the filter. Water is preferable as the raw water, and tap water and groundwater are exemplified.
  • the above-mentioned filter is suitably used for removing inorganic ions in water.
  • inorganic ions include hardness components and heavy metal ions. Specific examples of the hardness component include calcium ions and magnesium ions.
  • Heavy metal ions are metal elements having a specific gravity of 4 or more, and specifically, lead, mercury, arsenic, copper, cadmium, etc. Examples include chromium, nickel, manganese, cobalt and zinc.
  • raw water enters the perforated core material 13 from the water supply port (not shown) at the upper part of the casing 17 and moves to the surrounding body 10 through the holes 14 on the side surface of the perforated core material 13.
  • the solute contained in the raw water is removed while the raw water passes between the fabrics 11 of the surrounding body 10.
  • the permeated water flows from the side surface of the surrounding body to the space between the surrounding body and the casing 17, and flows out of the casing 17 from an outlet (not shown) at the lower part of the casing 17.
  • the radial direction coincides with the filtration direction.
  • the raw water enters the core material 13 from the upper part of the casing 61 and passes through the surrounding body 10.
  • the components in the raw water are adsorbed in the winding body 10, and the obtained permeated water is further filtered by the hollow fiber membrane 62.
  • the water that has passed through the hollow fiber membrane 62 passes through the inside of the hollow fiber membrane 62 and is discharged from the lower part of the casing 61.
  • the fiber that is the base material can be produced by melt spinning, electric field spinning, or wet spinning.
  • the sea-island melt spinning method is used, the base material is an island component, a component that is more soluble in an alkaline aqueous solution than an island component is a sea component, and a post-spinning alkaline aqueous solution is used.
  • the method for producing a polymer compound having an ion exchange group is as follows.
  • the fiber By imparting an ion exchange group or a chelate group to the fiber as the base material, the fiber becomes capable of ion exchange.
  • the ion exchange group imparted to the fiber include a strongly acidic cation exchange group such as a sulfonic acid group and a weakly acidic cation exchange group such as a carboxy group and a phosphoric acid group.
  • the monomer having a sulfonic acid group include styrene sulfonic acid, vinyl sulfonic acid, 2-acrylamide-2 methyl propane sulfonic acid, and sodium salts and ammonium salts thereof.
  • the monomer having a carboxyl group include acrylic monomers such as acrylic acid and methacrylic acid.
  • the monomer itself does not have an ion exchange group and / or a chelate group
  • examples of the monomer having a functional group that can be converted into an ion exchange group and / or a chelate group include acrylic acid ester, methacrylic acid ester, and methacrylic acid. Examples thereof include glycidyl, styrene, acrylonitrile, achlorine, and chloromethylstyrene. From the viewpoint of ion exchange capacity, it is particularly preferable to use an acrylic monomer.
  • a method for imparting such a functional group to the fiber it is preferable to graft-copolymerize the monomer having the above functional group to the fiber using an initiator, but an ion exchange group is irradiated with a gamma ray or an electron beam or the like.
  • the monomer having the above may be copolymerized with the fiber.
  • graft-copolymerizing a monomer having an ion-exchange group onto a fiber a layer of a polymer compound having an ion-exchange group is formed inside the fiber.
  • the initiator include ammonium persulfate (APS), azobisisobutyronitrile (AIBN), benzoyl peroxide (BPO) and the like.
  • a cross-linking agent may be added together with the monomer.
  • TEMED tetramethylethylenediamine
  • EDTA ethylenediaminetetraacetic acid
  • bifunctional acrylamide examples include N, N'-methylenebisacrylamide.
  • bifunctional acrylate examples include 2-hydroxy-3-acryloyloxypropyl methacrylate, polyethylene glycol diacrylate, 1,6-hexanediol diacrylate, and the like.
  • bifunctional methacrylate examples include ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, and polyethylene glycol dimethacrylate.
  • the metal particle-supporting fiber is produced by supporting the metal particles on the above-mentioned ion exchange fiber, and specifically, the metal particle-supporting fiber is produced. i) A solution of metal particles ii) A solution of a metal salt is prepared and brought into contact with an ion exchange fiber.
  • the metal particles form nanocolloids. After immersing the ion exchange fiber in the nanocolloidal solution of the metal particles, the excess adhered particles are washed with water to obtain the metal particle-supporting fiber.
  • the type of metal salt forming the metal salt solution is not particularly limited, but nitrates, sulfates, chlorides, fluorides, bromides having metal ions exemplified in "4. Fibrous adsorbent" above. , Iodide, acetate, carbonate, chromate, or salt having a metal oxide ion of the metal exemplified in the above "4. Fibrous adsorbent”.
  • the metal ion of the metal salt is adsorbed on the ion-exchange group, and if necessary, the metal ion of the metal salt is oxidized or reduced to form the ion-exchange fiber. Fine particles of metal oxide, metal hydroxide, or a single metal can be precipitated on the surface or inside.
  • the method of oxidation / reduction is not particularly limited, and in addition to the conventional method using a chemical oxidizing agent or a reducing agent, a catalyst, light irradiation, or the like can be used in combination. Further, by contacting the metal salt solution with the ion exchange fiber and then adding an alkali to the solution, it is also possible to precipitate metal oxide or metal hydrous oxide particles on the surface or inside of the fiber.
  • the woven fabric produced by the following method was wound around a perforated core material having an outer diameter of 10 mm and a length of 230 mm so as to have a thickness of 20 mm.
  • An epoxy resin adhesive was applied to the woven fabric surrounding portions on both end faces of the surrounding body.
  • the bottom of one end surface was sealed with a disk plate, and the enclosure was loaded into a case having an inner diameter of 54 mm to prepare a filter.
  • the target raw water is passed from the inside of the effective core material at one end of the surrounding body toward the outside of the woven fabric surrounding layer, and the raw water that has passed through the woven fabric surrounding layer is collected, and the opposite end is collected. It has a structure that can be discharged from the side.
  • ⁇ Single yarn diameter d> The woven fabric was immersed in RO water (reverse osmosis filtered water) for 24 hours, and then the diameter of 10 single yarns when observed with a microscope was measured, and the average value was taken as the single yarn diameter.
  • RO water reverse osmosis filtered water
  • ⁇ Aspect ratio of cross section of warp or weft> The woven fabric is immersed in RO water (back-penetration filtered water) for 24 hours, and the cross section perpendicular to the weft or warp is observed with a microscope, and the maximum in the thickness direction in the cross section of the warp or the fiber bundle constituting the weft.
  • the ratio of the maximum length in the direction perpendicular to the thickness direction to the length was defined as the aspect ratio, and 10 fibers were measured for each of the warp and weft fiber bundles, and the average value of each was defined as the aspect ratio.
  • ⁇ Cover Factor CF> The warp and weft were extracted from the woven fabric, and the weight (g) per 100,000 m was measured by 10 each, and the average diameter of each was taken as the warp or the multifilament diameter D (dtex) of the weft.
  • the woven fabric was observed from the upper surface with a microscope, the number of warp threads and weft threads per inch was measured at 10 points each, and the average value of each was taken as N (thread / inch), and CF was calculated from the above formula.
  • the total CF is twice that of CF.
  • ⁇ Amount of metal particles supported> A part of the woven fabric was cut out and its mass W1 was weighed. Next, the metal particles were taken out by dissolving the woven fabric in a good solvent such as a strong alkali or a strong acid aqueous solution, or heating at 800 ° C. or higher by an electric furnace, or a combination of these methods, and the mass W2 of the metal particles was weighed. .. The amount of the metal particles supported, that is, the mass ratio of the metal particles to the entire metal-supported fibers was calculated by (W2 / W1) ⁇ 100 (parts by mass).
  • a filter was prepared from the obtained woven fabric by the above-mentioned method.
  • Example 1 A woven fabric made of fibers carrying cerium hydroxide nanoparticles was produced by the following operation.
  • a woven fabric was produced using 170 decitex, 34 filament nylon 6 fibers, a twist of 0 T / m, and a plain weave machine with a number of meshes of warp and weft of 60 (pieces / inch).
  • the fabric about 1 part by weight, 0.375 parts by mass of methacrylic acid, 0.125 parts by weight of acrylic acid, Na0.15 parts by hydroxy sulfinic acid, EDTA ⁇ 2Na ⁇ 2H 2 O0.05 parts by mass of ammonium persulfate It was immersed in 100 parts by mass of an aqueous solution containing 0.05 parts by mass and allowed to stand at 70 ° C. for 1 hour. After standing, it was taken out and washed with RO water to obtain a woven fabric made of ion-exchange fibers.
  • the ion-exchange fiber was immersed in a 1 mol / L NaOH aqueous solution at room temperature for 3 hours to convert the carboxyl group, which is a functional group of the ion-exchange fiber, from H-type to Na-type.
  • the woven fabric was immersed in a 0.2 mol / L 3 aqueous solution of Ce (NO 3 ) at room temperature for 3 hours to convert the functional group from Na type to Ce type.
  • cerium hydroxide was precipitated near the surface of the woven fabric by immersing it in a 0.2 mol / L NaOH aqueous solution at room temperature for 3 hours. This was washed with RO water.
  • a filter was prepared from the obtained woven fabric by the above-mentioned method. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 2 A woven fabric was prepared using 115 decitex, 34 filament nylon 6 fibers, a twist of 0 T / m, and a plain weave machine with a mesh number of warp and weft of 60 (pieces / inch).
  • Cerium hydroxide was supported on this woven fabric by the same method as in Example 1. However, methacrylic acid was 0.9 parts by mass and acrylic acid was 0.3 parts by mass. A filter was prepared from the obtained woven fabric by the above-mentioned method. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 3 A woven fabric was prepared using 80 decitex, 34 filament nylon 6 fibers, a twist of 0 T / m, and a plain weave machine with a mesh number of 60 (pieces / inch) of warp and weft. Cerium hydroxide was supported on this woven fabric by the method described in Example 1. However, methacrylic acid was 3.75 parts by mass and acrylic acid was 1.25 parts by mass. A filter was prepared from the obtained woven fabric by the above-mentioned method. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 4 A filter was produced in the same manner as in Example 2 except that the twist degree of the warp and weft was 80 T / m. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 5 A filter was produced by the same method as described in Example 2 except that the number of meshes of the warp and weft was 42 (pieces / inch). Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 6 A filter was prepared in the same manner as in Example 2 except that 115 decitex and 376 filament nylon 6 fibers were used. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 7 A filter was prepared in the same manner as in Example 2 except that 115 decitex and 122 filaments of nylon 6 fibers were used. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 8 A filter was prepared in the same manner as in Example 2 except that 115 decitex, 7 filament nylon 6 fibers were used. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 9 A filter was prepared by the same method as described in Example 2 except that the twill structure was twill weave. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 10 A filter was produced by the same method as described in Example 2 except that the weave structure was satin weave. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 11 A filter was produced in the same manner as in Example 2 except that 115 decitex, 34 filaments, and three-leaf nylon 6 fibers having a single yarn shape having a degree of deformation of 3.0 were used. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • a woven fabric was prepared using 235 decitex, 34 filaments of polyethylene terephthalate fiber, a twist of 0 T / m, and a plain weave machine with a mesh number of 60 (pieces / inch) of warp and weft.
  • Both sides of this woven fabric were subjected to corona discharge treatment under a nitrogen atmosphere at a surface treatment strength of 30 W / min / m 2.
  • the treated woven fabric was immersed in a nanocolloidal solution of cerium oxide (solvent: water, concentration: 5% by mass) at room temperature for 1 day. Then, washing with water was performed to remove excess cerium oxide nanocolloidal solution.
  • a filter was prepared from the obtained woven fabric by the above method.
  • Comparative Example 2 A filter was produced in the same manner as in Comparative Example 1 except that the twist of the warp and weft was 80 T / m.
  • Comparative Example 3 A filter was produced by the same method as that described in Comparative Example 1 except that the number of meshes of the warp and weft was 50 (pieces / inch).
  • Comparative Example 4 A filter was prepared by the same method as that described in Comparative Example 1 except that the twill weave was used instead of the plain weave.
  • Comparative Example 5 A filter was prepared by the same method as that described in Comparative Example 1 except that the satin weave was used instead of the plain weave.
  • Comparative Example 6 A filter was produced in the same manner as in Comparative Example 1 except that the twist of the warp and weft was 750 T / m.
  • Comparative Example 7 A filter was produced by the same method as that described in Comparative Example 1 except that the number of meshes of the warp and weft was 80 (pieces / inch).
  • Comparative Example 8 Using one filament PET fiber having a fiber diameter of 25 ⁇ m, a woven fabric was produced with a plain weave machine having 220 (pieces / inch) meshes of warp and weft threads. For this woven fabric, a woven fabric made of fibers carrying cerium oxide nanoparticles was produced by the method described in Comparative Example 1. The obtained woven fabric was used to prepare a filter by the method described above.
  • Comparative Example 9 A filter was produced by the same method as that described in Comparative Example 1 except that the number of meshes of the warp and weft was 30 (pieces / inch).
  • Example 10 A filter was produced in the same manner as in Example 2 except that the twist degree of the warp and weft was 750 T / m. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 11 A filter was produced by the same method as described in Example 2 except that the number of meshes of the warp and weft was 30 (pieces / inch). Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 12 A filter was prepared in the same manner as in Example 2 except that 115 decitex and 1 filament nylon 6 fibers were used. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 13 A filter was produced by the same method as in Example 2 except that nylon 6 fibers having a fiber diameter of 0.4 ⁇ m and 900 filaments were used and the number of meshes of warp and weft was 220 (pieces / inch). did. Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 14 A filter was produced by the same method as described in Example 2 except that the number of meshes of the warp and weft was 80 (pieces / inch). Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • Example 15 A filter was produced in the same manner as in Example 2 except that the fiber diameter was 16 ⁇ m and one filament of nylon 6 fibers was used and the number of meshes of the warp and weft was 220 (pieces / inch). Further, when the cross section of the single yarn was observed using SEM-EDX and Na was mapped, Na was distributed near the surface of the single yarn, and the presence of a polymer compound layer containing a carboxy group which is an ion exchange group was found. It was suggested.
  • the filter of the present invention is suitably used for removing inorganic components dissolved in water.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Inorganic Chemistry (AREA)
  • Geology (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Water Treatment By Sorption (AREA)
  • Filtering Materials (AREA)

Abstract

La présente invention concerne un filtre pour filtration de liquides, ledit filtre étant pourvu d'un matériau central perforé et d'un tissu tissé qui est enroulé autour de la périphérie externe du matériau central perforé. Ce filtre pour filtration de liquides satisfait des conditions telles que : une chaîne du tissu tissé qui contient un multifilament qui contient de 7 à 700 fils simples ayant un diamètre de 1 µm à 100 µm ; une partie où trois fils simples ou plus contenus dans une chaîne sont empilés dans le sens de l'épaisseur, qui est présente dans une section transversale de la chaîne, ladite section transversale étant perpendiculaire au sens de la longueur ; le rapport de forme d'une section transversale d'une chaîne va de 1,5 à 10 ; et similaire.
PCT/JP2020/040811 2019-10-31 2020-10-30 Filtre pour filtration de liquides WO2021085601A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5658503A (en) * 1979-10-19 1981-05-21 Toray Ind Inc Functional fiber assembly
JP2012040526A (ja) * 2010-08-20 2012-03-01 Kurita Water Ind Ltd 液体濾過用フィルタ及び液体濾過方法
WO2018194177A1 (fr) * 2017-04-20 2018-10-25 東レ株式会社 Adsorbant fibreux, filtre de purification d'eau et procédé de traitement d'eau

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5384019A (en) * 1993-10-29 1995-01-24 E. I. Du Pont De Nemours And Company Membrane reinforced with modified leno weave fabric
JP4007994B2 (ja) * 2005-03-10 2007-11-14 ジャパンゴアテックス株式会社 繊維製品
CN102026712B (zh) * 2008-05-15 2013-07-24 熊津豪威株式会社 螺旋缠绕式滤芯
JP5658503B2 (ja) 2010-07-27 2015-01-28 パナソニックＩｐマネジメント株式会社 電源装置及びこの電源装置を備えた照明装置
US20180014584A1 (en) * 2015-02-03 2018-01-18 Asahi Kasei Kabushiki Kaisha Thin lightweight woven fabric
AU2016266324A1 (en) * 2015-05-27 2017-11-16 Toray Industries, Inc. Tubular woven fabric structure
US10662083B2 (en) * 2017-02-28 2020-05-26 Toray Industries Filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5658503A (en) * 1979-10-19 1981-05-21 Toray Ind Inc Functional fiber assembly
JP2012040526A (ja) * 2010-08-20 2012-03-01 Kurita Water Ind Ltd 液体濾過用フィルタ及び液体濾過方法
WO2018194177A1 (fr) * 2017-04-20 2018-10-25 東レ株式会社 Adsorbant fibreux, filtre de purification d'eau et procédé de traitement d'eau

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