EP0608248A1 - Matiere fibreuse en ptfe et son procede de fabrication. - Google Patents

Matiere fibreuse en ptfe et son procede de fabrication.

Info

Publication number
EP0608248A1
EP0608248A1 EP92918372A EP92918372A EP0608248A1 EP 0608248 A1 EP0608248 A1 EP 0608248A1 EP 92918372 A EP92918372 A EP 92918372A EP 92918372 A EP92918372 A EP 92918372A EP 0608248 A1 EP0608248 A1 EP 0608248A1
Authority
EP
European Patent Office
Prior art keywords
ptfe
fiber material
fluidized bed
additives
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92918372A
Other languages
German (de)
English (en)
Other versions
EP0608248B1 (fr
Inventor
Bruno Klatt
Manfred Horx
Hartmut Koelling
Karlheinz Berndt
Gerhard Kruger
Hans-Joachim Kuenne
Lothar Moerl
Lothar Backhauss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Magdeburger Energie und Umwelttechnik GmbH
De Nora Deutschland GmbH
Original Assignee
Chemie GmbH Bitterfeld Wolfen
Magdeburger Energie und Umwelttechnik GmbH
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
Application filed by Chemie GmbH Bitterfeld Wolfen, Magdeburger Energie und Umwelttechnik GmbH filed Critical Chemie GmbH Bitterfeld Wolfen
Publication of EP0608248A1 publication Critical patent/EP0608248A1/fr
Application granted granted Critical
Publication of EP0608248B1 publication Critical patent/EP0608248B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
    • D01F6/12—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons from polymers of fluorinated hydrocarbons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber

Definitions

  • the invention relates to a fiber material made of PTFE, which has a variety of applications due to a new structure, for example for the production of diaphragms for chlor-alkali electrolysis and for filter layers of different technical uses.
  • the invention also relates to a
  • PTFE fibers are known as monofilament fibers, which are suitable for the production of staple fibers of different lengths and diameters, yarns and fabrics.
  • Another PTFE fiber is made by grinding PTFE, sodium chloride and inorganic additives such as. B. ZrO 2 and TiO 2 , at elevated temperatures in a ball mill (DD-PS 244 365).
  • Processed PTFE fibers are principally suitable for the production of filter layers and diaphragms. However, it must be noted that the diaphragms made from these fibers are behind the
  • the aim of the invention is a fiber material made of PTFE, which has a wide range of applications and can be produced economically. According to the invention, a new structure of
  • a PTFE dispersion consisting of a salt solution with PTFE particles and optionally hydrophilizing additives is treated in a hot gas / steam stream at temperatures between 140 ° C. and 210 ° C. in a fluidized bed apparatus of FIG. 1 charged with inert bodies.
  • the PTFE dispersion contains a saline solution that
  • PTFE preferably consists of NaCl and whose concentration is between 100 g / l and the saturation limit.
  • Sodium chloride (also calculated as a solid) can be between 1: 1 and 1:10. Even without the addition of special hydrophilizing agents, in contrast to other PTFE fibers, the fiber material according to the invention has a certain hydrophilicity.
  • additives can be selected from the group known for a long time for this purpose
  • inorganic substances such as zirconium dioxide,
  • Magnesium oxide, magnesium hydroxide, calcium carbonate, etc. come.
  • the mixing ratio between PTFE (calculated as a solid) and the aggregate are between 20: 1 and 1: 5.
  • Another possibility of influencing the hydrophilic properties of the fiber material according to the invention is to use the principle of polymer-identical modification.
  • a portion of a PTFE powder is added to the aqueous PTFE dispersion, which by irradiation in the
  • the mixing ratio of the PTFE (calculated as a solid) with the highly functionalized PTFE can be between 100: 1 and 3: 1.
  • the parameters to be set in the fluidized bed apparatus relate to its design and equipment, shown in FIG. 1, and to the processes running in it.
  • the cross-sectional area of the discharge chamber 3 must be 2 to 5 times larger than the cross-sectional area of the swirl chamber 2. - Compared to the vertical, the wall of the expansion chamber 5 is inclined by 20 ° to 40 °.
  • the inflow floor 4 is 5 times to 20 times the cross-sectional dimension of the swirl chamber 2.
  • the inflow has a free cross-sectional area of 5 to 25%.
  • the diameter of the inert body is between 1 and 10 mm.
  • the temperature of the gas / steam flow entering the swirl chamber 2 should be selected between 270 and 340 ° C.
  • Powders, granules, agglomerates or other compact bodies are formed when using
  • the mean fiber length can be set within the limits provided the process parameters according to the invention are observed.
  • the different lengths of the fibers make it possible to control the properties of the filter layers and diaphragms made from this fiber material.
  • the permeability of the filters and diaphragms as well as their mean effective pore diameter and the pore size distribution can be influenced via the mass ratio of long-fiber to short-fiber components.
  • the fluidized bed apparatus 1 with a cylindrical vortex chamber 2 with a diameter of 150 mm and the processes taking place in it are characterized by the following parameters:
  • the wall of the expansion chamber 5 is inclined by 30 ° with respect to the vertical.
  • the fluidized bed apparatus is 2 m high.
  • the inflow floor has a specific free cross-sectional area of 10%.
  • this PTFE fiber material consists of tufts of fibers, which in turn are formed from microfibrils with irregularly shaped spaces.

Abstract

L'invention concerne une matière fibreuse en PTFE renfermant éventuellement des adjuvants conférant des propriétés hydrophiles, et offrant, de par sa structure, de grandes possibilités d'utilisation dans la fabrication de diaphragmes pour l'électrolyse de composés chloro-alcalins ainsi que pour des couches filtrantes. Conformément à l'invention, la matière fibreuse est caractérisée en ce qu'elle est constituée par des faisceaux de fibres, eux-mêmes étant formés de microfibrilles individuelles entre lesquelles sont ménagés des espaces intermédiaires de configuration irrégulière. On effectue la fabrication de cette matière fibreuse en soumettant, dans un appareil à lit fluidisé garni de corps inertes, une dispersion de PTFE composée d'une solution saline renfermant des particules de PTFE, avec addition éventuelle d'ajuvants à propriétés hydrophiles, à un traitement dans un courant de gaz chauds et de vapeur. Le procédé selon l'invention permet de fabriquer ladite matière fibreuse économiquement, de façon rationnelle sur un plan technique et en plus grandes quantités. En observant les paramètres mentionnés dans la description de l'invention, on peut agir sur la longueur des fibres.
EP92918372A 1991-09-12 1992-08-27 Matiere fibreuse en ptfe et son procede de fabrication Expired - Lifetime EP0608248B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4130356 1991-09-12
DE4130356A DE4130356C2 (de) 1991-09-12 1991-09-12 Fasermaterial aus PTFE und Verfahren zu seiner Herstellung
PCT/DE1992/000712 WO1993005213A1 (fr) 1991-09-12 1992-08-27 Matiere fibreuse en ptfe et son procede de fabrication

Publications (2)

Publication Number Publication Date
EP0608248A1 true EP0608248A1 (fr) 1994-08-03
EP0608248B1 EP0608248B1 (fr) 1997-07-30

Family

ID=6440453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918372A Expired - Lifetime EP0608248B1 (fr) 1991-09-12 1992-08-27 Matiere fibreuse en ptfe et son procede de fabrication

Country Status (4)

Country Link
US (1) US5700572A (fr)
EP (1) EP0608248B1 (fr)
DE (1) DE4130356C2 (fr)
WO (1) WO1993005213A1 (fr)

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KR20000069242A (ko) * 1996-12-13 2000-11-25 이노우에 노리유끼 불소수지 섬유상 재료 및 이것을 사용한 소취항균포
DE19746404A1 (de) * 1997-10-21 1999-04-22 Basf Ag Verfahren zur Herstellung von Kompositfasern und Disphragmen
US8178030B2 (en) 2009-01-16 2012-05-15 Zeus Industrial Products, Inc. Electrospinning of PTFE with high viscosity materials
US20130268062A1 (en) 2012-04-05 2013-10-10 Zeus Industrial Products, Inc. Composite prosthetic devices
EP2403982B1 (fr) * 2009-03-03 2014-10-29 Toray Fluorofibers (America) Inc. Matière polymère fluorée hydrophile et son procédé de fabrication
JP5456892B2 (ja) 2009-08-07 2014-04-02 ゼウス インダストリアル プロダクツ インコーポレイテッド 多層複合体
EP2563956A4 (fr) 2010-10-14 2013-09-18 Zeus Ind Products Inc Substrat antimicrobien
CN103561682A (zh) 2011-01-28 2014-02-05 梅瑞特医药体系股份有限公司 静电纺丝ptfe涂层支架及其使用方法
WO2013109528A1 (fr) 2012-01-16 2013-07-25 Merit Medical Systems, Inc. Appareils médicaux recouverts de matériau tissé rotationnel et procédés de fabrication
US10507268B2 (en) 2012-09-19 2019-12-17 Merit Medical Systems, Inc. Electrospun material covered medical appliances and methods of manufacture
US9198999B2 (en) 2012-09-21 2015-12-01 Merit Medical Systems, Inc. Drug-eluting rotational spun coatings and methods of use
US20140205781A1 (en) * 2013-01-23 2014-07-24 Zeus Industrial Products, Inc. Silicone espun ptfe composites
WO2014159399A1 (fr) 2013-03-13 2014-10-02 Merit Medical Systems, Inc. Procédés, systèmes et appareils de fabrication d'équipements tissés rotationnels
US10799617B2 (en) 2013-03-13 2020-10-13 Merit Medical Systems, Inc. Serially deposited fiber materials and associated devices and methods
US9422642B2 (en) * 2013-07-29 2016-08-23 Toray Fluorofibers (America), Inc. Wear polytetrafluoroethylene (PTFE) fiber and method of making same
DK3261589T3 (da) 2015-02-26 2020-12-14 Merit Medical Systems Inc Lagdelte medicinske indretninger
CN113862821B (zh) * 2021-09-24 2022-08-05 天津工业大学 一种聚苯硫醚纤维织物型碱性水电解隔膜及其制备方法

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Also Published As

Publication number Publication date
WO1993005213A1 (fr) 1993-03-18
DE4130356A1 (de) 1993-04-08
US5700572A (en) 1997-12-23
EP0608248B1 (fr) 1997-07-30
DE4130356C2 (de) 1995-01-26

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