WO1998001219A1 - Element filtrant - Google Patents

Element filtrant Download PDF

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Publication number
WO1998001219A1
WO1998001219A1 PCT/JP1997/002340 JP9702340W WO9801219A1 WO 1998001219 A1 WO1998001219 A1 WO 1998001219A1 JP 9702340 W JP9702340 W JP 9702340W WO 9801219 A1 WO9801219 A1 WO 9801219A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter member
membrane
spot
bondings
member according
Prior art date
Application number
PCT/JP1997/002340
Other languages
English (en)
Inventor
Masakazu Fujita
Takashi Kudo
Shoichi Murakami
Original Assignee
Teijin Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP17908196A external-priority patent/JPH1015362A/ja
Priority claimed from JP22836596A external-priority patent/JPH1066847A/ja
Application filed by Teijin Limited filed Critical Teijin Limited
Priority to EP97929539A priority Critical patent/EP0862491A1/fr
Publication of WO1998001219A1 publication Critical patent/WO1998001219A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/10—Supported membranes; Membrane supports
    • B01D69/107—Organic support material
    • B01D69/1071—Woven, non-woven or net mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/10—Supported membranes; Membrane supports

Definitions

  • the present invention relates to a filter member, more particularly to a filter member suited for membrane separation, for example, to treat waste water or to ensure drinking water in the event of a disaster or for use in the field.
  • Background of the Invention A variety of porous filter membranes have been used as filters for waste water treatment. These porous filter membranes are laid out on a frame body for use. Above all, a porous synthetic resin membrane comprising a high molecular weight polyethylene is used over an extensive range because of high porosity, excellent filtering capacity and economic advantages. (For example, see Japanese Patent TOKKAI-HEI No. 2-232242 (1990), TOKKAI-HEI No .5-98065 (1993), TOKKAI-HEI No . 5-239246 (1993) and TOKKAI-HEI No. 5-245923 (1993)).
  • Such a porous synthetic resin membrane comprising the polyethylene featuring high porosity and excellent filtering capacity provides an excellent tensile strength for the thin membrane in the machine direction and traverse direction, despite its high porosity since it comprises a high molecular weight polyethylene and is formed by high degree of stretching; whereas it is less strong in tear strength despite its flexibility, since the fibrous non-woven structure is formed m the direction of thickness. Accordingly, extreme care is required in handling the thin membrane when making an element for membrane separation by using this porous synthetic resin membrane of polyethylene laid out on the frame body, and making a module using this element. For example, there are problems such as easy separation from the surface layer when caught by small protrusions.
  • the supporting body for a filter membrane must allow the permeation of liquid more easily than the filter membrane itself.
  • a polyester non-woven fabric is used for this supporting body, and many improvements have been made.
  • Official Gazette of Japanese Patent No. TOKKO-HEI NO. -21526 (1992) discloses as the supporting body a multi-layered non-woven fabric based on the dual structure comprising a front surface layer having a greater aperture and surface roughness using thick fibers, and a back surface layer having a smaller aperture and compact structure using fine fibers.
  • this multi-layered non-woven fabric consisting of staple fibers serves to decrease variations in the thickness and water permeability of the non-woven fabric as the supporting body of the filter membrane; it is not intended to solve these problems which arise when said porous synthetic resin membrane of polyethylene featuring a high porosity and excellent filtering capacity is used as a filter membrane. At present, such problems as above-mentioned remain to be solved. Summary of the Invention
  • the present invention is intended to solve the problems involved in a conventional porous filter membrane using a porous synthetic resin membrane of polyethylene characterized by a high porosity and excellent filtering capacity, to ensure improvements in handling when preparing the element and module for membrane separation from the porous synthetic resin membrane, and to provide a porous filter member of excellent durability which ensures stable filtration of a large amount of fluid as in waste water treatment for a long time, without the filter member being damaged.
  • the present invention thus provides the following embodiments of a filter member:
  • a filter member comprising a porous filter membrane of a synthetic resin and a water-permeable reinforcing sheet laminated on the membrane wherein the membrane.and sheet are joined by spot-bondings scattered over an interfacial phase of lamination wherein the area of spot-bondmgs at any portion thereof is m the range of 0.05 - 0.35 cm per 1 cm of the interfacial phase.
  • a filter member according to (1) wherein the spot-bondmgs are polygonal bondings.
  • a filter member according to (1) wherein the spot-bondmgs are bondings with a network structure.
  • the membrane comprises a high molecular weight polyethylene having a molecular weight of 5 x 10 to 7 x 10 , and contains a large number of very fine pores providing a porosity of 60 to 90 and a pore diameter of 0.1 to 2.0 microns, the tensile strength and the tear strength in at least one of the machine and traverse directions of the membrane being 3.5 kg/5 cm or more, and 5 to 50 gram, respectively.
  • Fig. 1 is a perspective view of a schematic drawing representing an embodiment of a filter member laminated with a woven fabric as a water permeable reinforcing sheet according to the present invention.
  • Fig. 2 is a perspective view of a schematic drawing representing an embodiment of a filter member laminated with a porous film as a water-permeable reinforcing sheet according to the present invention.
  • Fig. 3 is a schematic drawing representing various forms of spot-bondings scattered over an interfacial phase of lamination of the present invention.
  • Fig. 4 is a perspective view representing an embodiment of an element for filtering treatment using a filter member according to the present invention.
  • Fig. 5 is a cross sectional view at A-A in Fig. 4 m the direction of the arrow.
  • Fig. 6 is a perspective view representing an embodiment of a reinforcing bar used for an element for filtering treatment based on a filter member according to the present invention.
  • Fig. 7 is a perspective view representing an embodiment of a filler used for an element for filtering treatment based on a filter member according to the present invention.
  • Fig. 8 is a perspective view representing an embodiment of an element for filtering treatment based on a filter member according to the present invention.
  • Fig. 9 is a cross sectional view of A-A in Fig. 8 in the direction of the arrow.
  • a porous synthetic resin membrane can be exemplified by various porous membranes comprising polytetra- fluoroethylene, polysulfone or hign molecular weigr.- poivethylene, where the water permeability is preferred to be 1 to 10 cc per min. per square centimeter.
  • water permeability characteristic is one obtained by converting the amount of pure water permeating the synthetic resin membrane (area : 4.7 cm x 4.7 cm) for one minute under a pressure of 0.5 kg/cm" into the units of " cc/ ⁇ un Jc "' .
  • the porous synthetic resin membrane is preferred to have a large number of very fine pores providing a porosity of 60 to 90% and a pore diameter of 0.1 to 2.0 microns.
  • porosity is calculated according to the following equation from the density (po) of the starting material and density (p) of synthetic resin membrane after molding:
  • the porous membrane comprising an ultra- high molecular weight polyethylene having a molecular weight of 5 x 10 L to 7 x 10 c is preferably used. If the molecular weight is too high, molding into a porous membrane will be difficult; whereas if it is too low, the strength of the porous membrane will be reduced, making it difficult to provide a high porous membrane with excellent filtering capacity.
  • the polyethylene may be copolymerized with a small amount (preferably 5 mol - or less) of propylene, butene, pentene, hexane, 4-methylpentene-l , and octene.
  • the polyethylene may contain a small amount (for example, 25 wt o or less) of polypropylene, polybutylene, and ethylene-propylene copolymer.
  • the polyethylene may contain the normally used additives such as a stabilizing agent, a coloring agent, a flame retarding agent and a static eliminating agent.
  • Such porous polyethylene membranes having a large number of very fine pores can be manufactured according to tne procedures disclosed in the Official Gazette of Japanese Patent Laid-Open Nos. TOKKAI-HEI 2-232242 (1990), TOKKAI-HEI 5-98065 (1993) and TOKKAI-HEI 5-239246 (1993) .
  • the solution (concentration: 2 to 30 wt C J obtained by dissolving an ultra-high molecular weight polyethylene having a molecular weight of 5 x lO 1 " into a solvent such as decalm is extruded from a slit-formed die to form a gel film; then it is stretched at a high stretching rate after the solvent has been evaporated in the gel film.
  • a polyethylene porous synthetic resin membrane preferably has a weight of 5 to 15 grams/ ⁇ r and a thickness of 25 to 60 microns.
  • the polyethylene porous synthetic resin membrane which can be used the present invention exhibits a fibrous non-woven structure m the direction of thickness, but the tear strength in at least one of the machine and traverse directions is preferred to be 5 to 50 grams .
  • a filter member according to the present invention comprises the porous membrane and a water-permeable reinforcing sheet laminated on the membrane order to improve tear strength, rigidity and durability.
  • the water-permeable reinforcing sheet of various materials and forms can be used if the high porosity and high filtering capacity of porous filter membrane are not degraded, namely, if it has tne same or greater water permeability than the porous synthetic resin membrane (1 to 10 cc/mm/c ⁇ r ) .
  • a reinforcing sheet having a tear strengt of 0.2 kg or more at least one of the machine and traverse directions is preferred.
  • the fibrous clotn or porous film is preferably used as such a water-permeable reinforcing sheet.
  • the woven, knitted or non-woven fabric can be used as the fibrous cloth, and especially a woven fabric or non-woven fabric consisting of continuous fibers is preferred.
  • a material polyester, polyamide, polyolef or polyvinyl chloride can be selected as required, and the use of polyester or polyolefm is preferred.
  • a weight of about 10 to 150 grams/m is preferred.
  • the cloth When a fibrous cloth is used as the reinforcing sheet, the cloth may be quilted, thread strips of high strength may be inserted at a specified interval in the longitudinal and/or traverse direction of the cloth, or tape-formed synthetic resin membrane may be partially bonded to the cloth.
  • a pore diameter of 0.1 to 2.0 mm, a porosity of 30 to 90 1, and a film thickness of 5 to 500 microns are preferred.
  • polyester or polyolefm as the porous film is preferred.
  • a filter member according to the present invention comprises a porous filter membrane of a synthetic resin and a water-permeable reinforcing sheet laminated on the membrane, each having the above characteristics. What is very important is that the membrane and sheet are joined by spot-bondmgs scattered over an interfacial phase of lamination wherein the area of spot-bondmgs is tne range of 0.05 - 0.35 cm- per 1 cm of the interfacial phase wnen taken at any portion thereof.
  • the interfacial phase of lamination can be present on one side or both sides (that is, water-permeable reinforcing sheet on both sides of the porous synthetic resin membrane) .
  • Fig. 1 is a perspective view of a schematic drawing showing an embodiment of a filter member 1 laminated with woven fabric 3 as a water-permeable reinforcing sheet on a porous synthetic resin membrane 2.
  • T is a partial schematic showing the relation between warp and weft yarn consisting of woven fabric 3.
  • D, D' is a partial schematic showing the spot-bondmgs per 1 cm " scattered over an interfacial phase of lamination.
  • D shows the spot-bondmgs a partial schematic S, wherein the fabric 3 is peeled from the membrane 2 at an interfacial phase of lamination and D' shows the image of the spot bondings at inner interfacial phase of lamination.
  • each area of D and D' is 1 cm : , and at D the membrane 2 and sheet 3 are joined by dot-like spot-bondings (di, d_, d_ , d_ ) and the total area of the spot-bondmgs is in the range of 0.05 - 0.35 cm .
  • FIG. 2 is another perspective view of the schematic drawing showing an embodiment of a filter member 1, laminated with porous film 4 as a water-permeable reinforcing sheet on a porous synthetic resin membrane 2.
  • P is a partial schematic showing small pores formed m the porous film 4.
  • L, L' is a partial schematic showing the spot bondings per 1 cm scattered over an interfacial phase of lamination.
  • L shows the spot-bondmgs in a partial schematic S, wherein the film 4 is peeled from the membrane 2 at an interfacial phase of lamination and L' shows the image of the spot bondings at inner interfacial phase of lamination .
  • each area of L and L' is 1 cm", and at L the membrane 2 and film 4 are joined by linear spot-bondings ( (1 ) and the area of said spot-bondmgs is in the range of 0.05 - 0.35 cm " .
  • the tear strength, rigidity and durability of the porous synthetic resin membrane must be improved by ensuring that the fine pores of the porous synthetic resin membrane will not be blocked by spot-bondmgs scattered over an interfacial phase of lamination with a water-permeable reinforcing sheet.
  • spot-bondmgs preferably have a dot-like, linear, polygonal or network structure.
  • Fig. 3 is a schematic diagram showing the various forms of spot-bondmgs.
  • Symbol (a) denotes dot-like spot-bondmgs with a very small area, and dot-like spot-bondmgs are scattered such that a specified bonded area will be formed per 1 cm of the interfacial phase when taken at any portion thereof .
  • Symbol (b) represents linear spot-bondmgs formed by a straight line ((b)-l) or curve ((b) -2) having the width and length.
  • Symbol (c) denotes polygonal spot-bondmgs ((c)-l) formed by straight line or curve having the width and length connected with each other with a space left inside, or polygonal spot-bondings ((c) -2) as its condensed form.
  • Symbol (d) denotes spot-bondmgs with a network structure formed by the straight line or curve having the width and length. Similar to spot-bondmgs of (a), spot-bondings of (b) , (c) or (d) are scattered to form a specified area per 1 cm of the interfacial phase when taken at any portion thereof.
  • spot-bondmgs having numerous straight or curved spot-bon ⁇ mgs will provide greater reinforcement effect on the same area of spot-bondmgs .
  • polygonal spot-bondmgs are especially preferred to dot-like spot-bondmgs because they ensure that greater reinforcement effect, and filtering capacity are compatible with each other with the reduced area of spot- bondmgs .
  • the spot-bondings of a dot-like, linear, polygonal or network structure can be formed on an interfacial phase of lamination by the method of bonaing by heat and pressure after applying a bonding agent to the gravure roll engraved in a specified shape, or jetting a hc melt oonding agent in the form of filament or powder, and ultrasonic or other thermal sealing methods which do not use any oonding agent .
  • the member is preferably made into the filtering element laid out on both sides of the frame body or the filtering element molded in the bag form.
  • Fig. 4 is a perspective view representing the embodiment of an element for filtering treatment utilizing a filter member according to the present invention.
  • Fig. 5 is a cross sectional view of A-A in the direction of the arrow, representing the element.
  • Numeral 1 denotes a filter member according to the present invention, 11 a frame body, 12 a network body, 13 a felt and 14 an outlet.
  • Fig. 8 is a perspective view showing another form of the element or filtering treatment using a filter member according to the present invention.
  • Fig. 9 is a cross sectional view A-A in the direction of the arrow, representing the element.
  • Numeral 1 denotes a filter member according to the present invention, 21 a bag body formed of the member, 22 a form-retaining member accommodated in the bag body 21, 23 an outlet provided m the bag body 21, 24 a sealed portion of a filter member 1, and 25 a water passageway formed above the form-retaining member.
  • a filter member according to the present invention is used for waste water treatment, a multiple number of elements for the filtering treatment comprising a filter member 1 of the present invention laid out on both sides of the frame body as shown m Fig.
  • the water to be treated such as waste water is supplied from the outside, and is filtered by a filter member 1 ; then the filtered water is sucked by a suction pump (not illustrated) , and discharged from outlet 14.
  • the clearance inside the frame body 11 with the filler member 19, as shown m Fig. 7 can be filled, thereby ensuring water will not remain m the frame body 11.
  • the space 17 of the reinforcing bar 16 can be filled with filler member 19, and thus installed mside the frame body 11.
  • a foame ⁇ plastic product having isolated cell foams is preferred.
  • foamed polystyrene is preferably used.
  • a filter member of the present invention can be used for waste water treatment or the like as the element for filtering treatment formed in a bag body, as shown in Fig. 8.
  • the bag body 21 can be made from a filter member of the present invention by forming the sealed portion 24, using an ultrasonic or other thermal sealing method employed for the production of a bag body for foodstuffs.
  • thermal sealing provides low-cost and sufficient sealing properties.
  • a filter member wherein a polyester woven fabric is laminated onto a polyethylene porous synthetic resin membrane and is joined by spot-bondmgs, sufficient sealing properties can be obtained by providing the sealed portion using ultrasonic thermal sealing method through melting of the polyethylene placing the polyester woven fabric on the inner side and polyethylene membrane on the outer side.
  • outlet 23 molded m a valve form advance can be mounted on the bag body 21 according to the method similar to the above thermal sealing.
  • a form-retaining member 22 is stored in the bag body 21 to prevent the bag body 21 from being crushed when filtered water is sucked from the outlet 23.
  • the element must be removed from the water to be treated on a periodic basis for inspection and replacement.
  • the water mside the element may not be discharged immediately, and this may make it difficult to remove the element because of the weight of the remaining water.
  • the filter member may be damaged.
  • a water passageway 25 is preferably formed on the surface of the form-retaining member 22 m order to ensure smooth passing of water and filtering due to the bag body 21, without being brought into close contact with the form- retammg member 22.
  • a groove may be formed, as illustrated in Fig. 9 or multiple convex and concave shapes may be formed.
  • a meshed or corrugated groove on the entire surface of form-retaining member 22 is also effective.
  • the meshed fibrous member or plastic member may be installed on the surface of the form-retaining member 22 , thereby forming a water passage.
  • the element shown m Fig.8 which was formed from a filter member of tne present invention into the bag body, this element is put into tne water such as waste water, and water is sucked from the outlet 23; then water is filtered by the member 1 forming the Pag body 21 in the direction shown by the arrow mark in Fig. 9, is sucked into bag body 21, and is removed from the outlet 23 as purified water. Furthermore, when purified water such as drinking water is required in the event of a disaster or n field use, this element can be put into the water of a river, pond and other such places to suck water from the outlet 23.
  • the present invention solves the problems involved a conventional filter member using a porous synthetic resin membrane featuring a high porosity and excellent filtering capacity, ensures improvements in handling when preparing the element and module for membrane separation from the porous synthetic resin membrane, and provides a porous filter member of excellent durability which ensures stable filtration of a large amount of fluid as m waste water treatment over a long period of time, without the filter member being damaged.
  • the element for filtering treatment using a filter member of the present invention can be produced by laying out the member on both sides of the frame body or molding it in the form of a bag.
  • the element for filtering treatment molded in bag form is light weight, has excellent handling and has high filtering capacity without any problems in sealing.
  • easy mounting and dismounting of the bag body arises, and it is possible to provide at low-cost an element for filtering treatment and the module for filtering treatment incorporating said element.
  • waste water treatment it is expected to find applications over a variety of fields including its application to ensure a drinking water m the event of disaster or m the field.
  • Water permeability was obtained by converting the amount of pure water permeating the synthetic resm membrane (area: 4.7 cm x 4.7 cm) for one minute under a pressure of 0.5 kg/cm into units of cc/min./c ⁇ r .
  • a urethane based adhesive (Polyflex BD registered trade name of Danchikogyoseiyaku Ltd.) was applied m a dot-like structure using a gravure roll engraved m a dot-like structure on one side of the polyethylene terephthalate taffeta woven fabric (B) having the above-mentioned characteristics, on which the porous filter membrane (A) having the above-mentioned characteristics was laminated. Then they were calendered at a temperature of 160 * 0 and joined by spot-bondmgs to each other. In this case, the number of dot-like engravings was changed to evaluate the area of spot-bondmgs, and the accompanying physical properties and effects. Table 1 shows the results of this evaluation. Examples 5 to 6
  • Porous film - Material Polyethylene (by Tamapo i Ltd.)
  • the element for filtering treatment (75 cm vertical, 30 cm lateral, 1.1 cm thick) shown m Figs .8 and 9 was prepared using a filter member each example. After tap water was sucked at 0.2kg/cm 2 for five minutes by this element, backwashmg was performed at 0.1 kg/cm" for five minutes. After repeating this operation 10, 000 times, the peeling state in a filter member was evaluated.
  • Example 1 0
  • the following element for filtering treatment shown in Figs. 8 and 9 were prepared using a filter member in Example 3: - Dimensions 75 cm (vertical) x 30 cm (lateral) - Thickness 1.1 cm Ten of these elements were arranged in parallel inside a module for filtering treatment. Waste water used to wash clothing was poured inside the module at a flow rate of 1.8m 3 per day. At the same time, purified water was sucked and removed from the outlet of the element at the same speed.

Abstract

La présente invention concerne un élément filtrant présentant d'excellentes propriétés de manipulation pendant la préparation de l'élément et un module de séparation par membrane provenant de l'élément filtrant et caractérisé par une porosité élevée et une excellente aptitude au filtrage, l'élément et la membrane présentant une excellente durée de vie comme filtres pour le traitement des eaux usées. Un élément filtrant comprend une membrane-filtre poreuse faite de résine synthétique et une feuille de renfort perméable à l'eau, stratifiée sur la membrane, cette dernière étant jointe à la feuille par des liages par points éparpillés sur une phase de contre-collage interfacial, la zone des liages par points présentant en n'importe quelle partie de cette zone un rapport compris dans les limites de 0,05 à 0,35 cm2 pour 1 cm2 de ladite phase interfaciale.
PCT/JP1997/002340 1996-07-09 1997-07-07 Element filtrant WO1998001219A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97929539A EP0862491A1 (fr) 1996-07-09 1997-07-07 Element filtrant

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP17908196A JPH1015362A (ja) 1996-07-09 1996-07-09 袋型膜モジュール
JP8/179081 1996-07-09
JP8/228365 1996-08-29
JP22836596A JPH1066847A (ja) 1996-08-29 1996-08-29 多孔性濾過膜及び該濾過膜を用いた膜モジュール

Publications (1)

Publication Number Publication Date
WO1998001219A1 true WO1998001219A1 (fr) 1998-01-15

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ID=26499047

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/002340 WO1998001219A1 (fr) 1996-07-09 1997-07-07 Element filtrant

Country Status (4)

Country Link
EP (1) EP0862491A1 (fr)
CN (1) CN1197409A (fr)
ID (1) ID20443A (fr)
WO (1) WO1998001219A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201294A1 (fr) * 2000-10-30 2002-05-02 ICTechnology AG Coussin de filtration à membrane
US6986428B2 (en) 2003-05-14 2006-01-17 3M Innovative Properties Company Fluid separation membrane module
EP1625885A1 (fr) * 2004-08-11 2006-02-15 Vlaamse Instelling Voor Technologisch Onderzoek (Vito) Membrane avec des conduits de perméat intégrés
DE102004057107A1 (de) * 2004-11-26 2006-06-01 A3 Abfall-Abwasser-Anlagentechnik Gmbh Rahmenloser, plattenförmiger Filtrationskörper
US7279215B2 (en) 2003-12-03 2007-10-09 3M Innovative Properties Company Membrane modules and integrated membrane cassettes
ES2390542A1 (es) * 2010-03-11 2012-11-14 Lisardo A. GONZALEZ ABELLEIRA Filtro para depuracion de agua

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4175410B2 (ja) * 2006-08-31 2008-11-05 ダイキン工業株式会社 空気調和機
JP4766167B2 (ja) * 2009-01-28 2011-09-07 ダイキン工業株式会社 空調室内機、およびフィルタ清掃装置の製造方法

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EP0259128A2 (fr) * 1986-09-01 1988-03-09 Nitto Denko Corporation Feuille poreuse composée de couches thermoplastiques sur un support
EP0355214A1 (fr) * 1987-04-30 1990-02-28 Tonen Corporation Procédé pour la production de membranes microporeuses de polyoléfine de très haut poids moléculaire
EP0457952A1 (fr) * 1988-10-26 1991-11-27 ZACHARIADES, Anagnostis E. Structure composite de polymères à ultra haut poids moléculaire telle que produits de polyéthylène à ultra haut poids moléculaire, et sa méthode de production
EP0476198A1 (fr) * 1989-08-03 1992-03-25 Tonen Corporation Membrane microporeuse de polyoléfine et procédé pour sa fabrication
EP0504954A1 (fr) * 1991-02-18 1992-09-23 Dsm N.V. Feuille microporeuse en polyéthylène et procédé pour sa fabrication
EP0602560A1 (fr) * 1992-12-16 1994-06-22 Kubota Corporation Cartouche à membrane filtrante

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0259128A2 (fr) * 1986-09-01 1988-03-09 Nitto Denko Corporation Feuille poreuse composée de couches thermoplastiques sur un support
EP0355214A1 (fr) * 1987-04-30 1990-02-28 Tonen Corporation Procédé pour la production de membranes microporeuses de polyoléfine de très haut poids moléculaire
EP0457952A1 (fr) * 1988-10-26 1991-11-27 ZACHARIADES, Anagnostis E. Structure composite de polymères à ultra haut poids moléculaire telle que produits de polyéthylène à ultra haut poids moléculaire, et sa méthode de production
EP0476198A1 (fr) * 1989-08-03 1992-03-25 Tonen Corporation Membrane microporeuse de polyoléfine et procédé pour sa fabrication
EP0504954A1 (fr) * 1991-02-18 1992-09-23 Dsm N.V. Feuille microporeuse en polyéthylène et procédé pour sa fabrication
JPH0598065A (ja) * 1991-02-18 1993-04-20 Dsm Nv ポリエチレン微孔性フイルムおよびその製造方法
EP0602560A1 (fr) * 1992-12-16 1994-06-22 Kubota Corporation Cartouche à membrane filtrante

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201294A1 (fr) * 2000-10-30 2002-05-02 ICTechnology AG Coussin de filtration à membrane
US6986428B2 (en) 2003-05-14 2006-01-17 3M Innovative Properties Company Fluid separation membrane module
US7279215B2 (en) 2003-12-03 2007-10-09 3M Innovative Properties Company Membrane modules and integrated membrane cassettes
EP1625885A1 (fr) * 2004-08-11 2006-02-15 Vlaamse Instelling Voor Technologisch Onderzoek (Vito) Membrane avec des conduits de perméat intégrés
WO2006015461A1 (fr) * 2004-08-11 2006-02-16 Vlaamse Instelling Voor Technologisch Onderzoek (Vito) Membrane a canal a permeat integre
US7862718B2 (en) 2004-08-11 2011-01-04 Vlaamse Instelling Voor Technologisch Onderzoek (Vito) Integrated permeate channel membrane
DE102004057107A1 (de) * 2004-11-26 2006-06-01 A3 Abfall-Abwasser-Anlagentechnik Gmbh Rahmenloser, plattenförmiger Filtrationskörper
DE102004057107B4 (de) * 2004-11-26 2016-05-25 A3 Water Soutions GmbH Rahmenloser, plattenförmiger Filtrationskörper und Filtrationsmodul
DE102004057107B8 (de) * 2004-11-26 2016-07-28 A3 Water Solutions Gmbh Rahmenloser, plattenförmiger Filtrationskörper und Filtrationsmodul
ES2390542A1 (es) * 2010-03-11 2012-11-14 Lisardo A. GONZALEZ ABELLEIRA Filtro para depuracion de agua

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Publication number Publication date
EP0862491A1 (fr) 1998-09-09
CN1197409A (zh) 1998-10-28
ID20443A (id) 1998-12-17

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