EP0757730A1 - Tissu enduit - Google Patents

Tissu enduit

Info

Publication number
EP0757730A1
EP0757730A1 EP95916779A EP95916779A EP0757730A1 EP 0757730 A1 EP0757730 A1 EP 0757730A1 EP 95916779 A EP95916779 A EP 95916779A EP 95916779 A EP95916779 A EP 95916779A EP 0757730 A1 EP0757730 A1 EP 0757730A1
Authority
EP
European Patent Office
Prior art keywords
polymer
foaming agent
coagulated
cloth
derivatives
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.)
Withdrawn
Application number
EP95916779A
Other languages
German (de)
English (en)
Inventor
Peter Lofts
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.)
Scapa Group Ltd
Original Assignee
Scapa Group Ltd
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 Scapa Group Ltd filed Critical Scapa Group Ltd
Publication of EP0757730A1 publication Critical patent/EP0757730A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/08—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with halogenated hydrocarbons
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D06M15/233—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated aromatic, e.g. styrene
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • D06M15/248—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing chlorine
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/04—Processes in which the treating agent is applied in the form of a foam
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/042—Acrylic polymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/06—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with polyvinylchloride or its copolymerisation products
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/10—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with styrene-butadiene copolymerisation products or other synthetic rubbers or elastomers except polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/30—Protecting wire-cloths from mechanical damage

Definitions

  • the present invention relates to coated fabrics, particularly for use in phase separation processes such as papermaking and filtration.
  • the coated fabrics of the invention have particular, but not exclusive, application in the filtration of ingestible materials.
  • DMF is a toxic substance. If the filter fabric is to be used in foodstuffs related areas any residual DMF remaining in the filter fabric may end up in the foodstuffs which come near or into contact with the filter fabric. This is obviously undesirable.
  • the present invention seeks to provide an alternative method of making a coated filter fabric which avoids the use of toxic substances such as DMF.
  • a method of making a coated fabric to be used in a phase separation process comprising the steps of impregnating a cloth with at least one coagulable polymer latex and coagulating the polymer on or in the cloth, wherein the method comprises carrying out the coagulation from the water phase so as to provide a cloth having a porous polymer coating thereon and/or therein.
  • the polymer is preferably coagulated with steam or super ⁇ heated steam rather than water.
  • the polymer used may comprise polyurethane.
  • polyurethane is susceptible to hydrolytic degradation.
  • polymers having improved resistance to hydrolytic degradation include polymers containing hydrolysis-susceptible linkages such as esters or amide.
  • Suitable examples include polyisoprene, polybutadiene, polyvinylidene dichloride, polyvinyl chloride, polychloroprene and particularly styrene- butadiene polymers or mixtures thereof.
  • Fabrics having such polymer coatings surprisingly exhibit vastly improved resistance to hydrolysis, acids/alkalis and oxidation.
  • the cloth substrate may be woven or nonwoven, but is preferably a needlefelt.
  • the cloth may be made from any suitable material, such as polypropylene.
  • the coagulated polymer is preferably foamed, said foaming occurring simultaneously with or immediately after the coagulation.
  • Foaming may be achieved either by physical means or by using a chemical foaming agent.
  • the foaming agent preferably comprises a low boiling water insoluble halogenated hydrocarbon.
  • the halogenated hydrocarbon preferably has a boiling point in the range from -40°C to 50°C and more preferably in the range from -20°C to 30°C.
  • Preferred foaming agents include l,2-dibromo-l,l,2,2-tetrafluoroethane and trichlorofluoroethane.
  • the foaming and/or the coagulation of the polymer may be achieved by heating the impregnated coated textile substrate, preferably in the presence of a heat coagulant.
  • Suitable heat coagulants include vinyl alkyl ether and derivatives thereof, polyacetals, polythio ethers, poly(ethylene oxide) and derivatives thereof, and poly(propylene/ethylene oxide) and derivatives thereof.
  • the heat coagulant may be built into the backbone of the polymer. Usually heating to a temperature of about 70 °C results solely in coagulation. Heating above this temperature will generally also result in foaming provided a foaming agent is present.
  • Coagulation may also be achieved by means of adding a suitable electrolyte and/or varying the pH of the polymer latex. For example, with cationic polymers coagulation may occur at an alkaline pH and for anionic polymers coagulation occurs at an acid pH. This may be followed by heating to achieve satisfactory foaming.
  • the coagulated coatings may be particle-reinforced or fibre-reinforced.
  • the strength of the individual cells in the coagulated cellular polymer network can be improved by the addition of finely-chopped fibres such as RYTON fibres and/or finely dispersed particles such as PTFE particles.
  • These particles and/or fibres should ideally have a chemical inertness, heat stability and acid and/or alkali resistance at least similar to that of the coagulated polymer.
  • the particles and fibres would be incorporated into the polymer emulsion prior to coagulation.
  • the filter cloths have a coating thickness in the range from 0.5 to 2.0mm, corresponding to 50 to 250 (preferably 120 to 180) g/m 2 addition by weight of polymer.
  • the coating may be applied by any coating technique such as knife coating, dip coating, lick coating, screen printing or spraying. Reverse roller techniques may be employed.
  • the method of the invention may also be used to provide coatings on papermachine clothing such as press felts.
  • the coatings obtained would be tough, smooth and permeable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Procédé de fabrication d'un tissu enduit à utiliser dans un processus de séparation de phases, consistant à imprégner un tissu d'au moins un latex polymère coagulable et à faire coaguler le polymère sur ou dans le tissu. La coagulation s'effectue à partir d'une phase aqueuse afin de produire un tissu sur et/ou dans lequel est appliqué un enduit polymère poreux.
EP95916779A 1994-04-27 1995-04-26 Tissu enduit Withdrawn EP0757730A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9408307 1994-04-27
GB9408307A GB9408307D0 (en) 1994-04-27 1994-04-27 Coated fabric
PCT/GB1995/000961 WO1995029285A2 (fr) 1994-04-27 1995-04-26 Tissu enduit

Publications (1)

Publication Number Publication Date
EP0757730A1 true EP0757730A1 (fr) 1997-02-12

Family

ID=10754186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95916779A Withdrawn EP0757730A1 (fr) 1994-04-27 1995-04-26 Tissu enduit

Country Status (5)

Country Link
EP (1) EP0757730A1 (fr)
AU (1) AU690673B2 (fr)
CA (1) CA2188780A1 (fr)
GB (2) GB9408307D0 (fr)
WO (1) WO1995029285A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1283450B1 (it) * 1996-07-18 1998-04-21 Fad Fabriano Autoadesivi S P A Mezzo filtrante in forma di foglio di carta per filtri di fluidi in genere
KR19980018147A (ko) * 1996-08-09 1998-06-05 월워크 알란 씨. 폴리머 공극 필터
GB9803172D0 (en) * 1998-02-14 1998-04-08 Scapa Group Plc Porous belts
GB9811082D0 (en) * 1998-05-23 1998-07-22 Scapa Group Plc Improvements in phase-separation etc.members

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619257A (en) * 1967-08-08 1971-11-09 Toyo Tire & Rubber Co Preparation of plural layer synthetic leather and the like
US3788882A (en) * 1970-02-18 1974-01-29 Richardson Co Synthetic composite and process for preparing
DE2122142A1 (de) * 1971-05-05 1972-11-23 Kalle Ag, 6202 Wiesbaden-Biebrich Verfahren zum Verfestigen von nicht gewebten, textlien Faserflächengebilden
DE2132001C3 (de) * 1971-06-28 1975-04-10 Roehm Gmbh, 6100 Darmstadt Verfahren zum Verfestigen von Faservliesen zu einem lederartigen Werkstoff
US4144209A (en) * 1973-02-01 1979-03-13 Johnson & Johnson Resin latex compositions
DE2323583A1 (de) * 1973-05-10 1974-11-28 Feldmuehle Anlagen Prod Verfahren und vorrichtung zur herstellung von flaechengebilden
DE2415602A1 (de) * 1974-03-30 1975-10-16 Bayer Ag Vorverfestigung von vliesen
US4429000A (en) * 1979-12-11 1984-01-31 Toray Industries, Inc. Moisture-permeable waterproof coated fabric and method of making the same
NL8401784A (nl) * 1984-06-04 1986-01-02 Stahl Chemical Ind Werkwijze voor het vervaardigen van een coagule.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9529285A3 *

Also Published As

Publication number Publication date
WO1995029285A2 (fr) 1995-11-02
AU690673B2 (en) 1998-04-30
GB2288755A (en) 1995-11-01
GB9508577D0 (en) 1995-06-14
CA2188780A1 (fr) 1995-11-02
GB9408307D0 (en) 1994-06-15
WO1995029285A3 (fr) 1995-12-07
AU2314895A (en) 1995-11-16

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