GB2288755A - Coated fabric - Google Patents
Coated fabric Download PDFInfo
- Publication number
- GB2288755A GB2288755A GB9508577A GB9508577A GB2288755A GB 2288755 A GB2288755 A GB 2288755A GB 9508577 A GB9508577 A GB 9508577A GB 9508577 A GB9508577 A GB 9508577A GB 2288755 A GB2288755 A GB 2288755A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymer
- foaming agent
- cloth
- coagulated
- 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- Withdrawn
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 28
- 229920000642 polymer Polymers 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 238000005345 coagulation Methods 0.000 claims abstract description 10
- 230000015271 coagulation Effects 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004816 latex Substances 0.000 claims abstract description 6
- 229920000126 latex Polymers 0.000 claims abstract description 6
- 238000005191 phase separation Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 230000001112 coagulating effect Effects 0.000 claims abstract description 3
- 239000004088 foaming agent Substances 0.000 claims description 9
- -1 polypropylene Polymers 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 5
- 239000000701 coagulant Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 150000008282 halocarbons Chemical class 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- ZXUJWPHOPHHZLR-UHFFFAOYSA-N 1,1,1-trichloro-2-fluoroethane Chemical compound FCC(Cl)(Cl)Cl ZXUJWPHOPHHZLR-UHFFFAOYSA-N 0.000 claims description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 239000005062 Polybutadiene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 2
- 239000002174 Styrene-butadiene Substances 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- KVBKAPANDHPRDG-UHFFFAOYSA-N dibromotetrafluoroethane Chemical compound FC(F)(Br)C(F)(F)Br KVBKAPANDHPRDG-UHFFFAOYSA-N 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 2
- 229920002857 polybutadiene Polymers 0.000 claims description 2
- 229920001195 polyisoprene Polymers 0.000 claims description 2
- 229920006324 polyoxymethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920006295 polythiol Polymers 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 2
- 239000011115 styrene butadiene Substances 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 10
- 238000005187 foaming Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 229920013632 Ryton Polymers 0.000 description 1
- 239000004736 Ryton® Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229920006318 anionic polymer Polymers 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000005670 ethenylalkyl group Chemical group 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
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
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
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. The coagulation is carried from a water phase so as to provide a cloth having a porous polymer coating thereon and/or therein. The water phase is preferably steam. The coated materials are used mainly for filtering but may also be used in paper-making processes.
Description
COATED FABRIC
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.
It is known to prepare coated filter fabrics by applying a solution of a polyurethane in DMF (dimethyl formamide) either by immersion in or by coating on one side and then immersing the treated cloth in water. The polyurethane is coagulated and is attached to the fabric as a result.
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.
According to the present invention there is provided 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 superheated steam rather than water.
The polymer used may comprise polyurethane. However, polyurethane is susceptible to hydrolytic degradation. In some instances it is desirable to use polymers having improved resistance to hydrolytic degradation. In such circumstances polymers containing hydrolysis-susceptible linkages such as esters or amide should be avoided. Suitable examples include polyisoprene, polybutadiene, polyvinylidene dichloride, polyvinyl chloride, polychloroprene and particularly styrenebutadiene 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 500C and more preferably in the range from -20 C to 30at. Preferred foaming agents include 1,2-dibromo-1,1,2,2-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 700C 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.
Preferably the filter cloths have a coating thickness in the range from 0.5 to 2.Omm, corresponding to 50 to 250 (preferably 120 to 180) g/m2 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.
Claims (16)
1. 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 a water phase so as to provide a cloth having a porous polymer coating thereon and/or therein.
2. A method as claimed in claim 1, wherein the water phase comprises steam.
3. A method as claimed in claim 1 or claim 2, wherein the polymer comprises polyurethane.
4. A method as claimed in claim 1 or claim 2, wherein the polymer comprises any of the following:- polyisoprene, polybutadiene, polyvinylidene dichloride, polyvinyl chloride, polychloroprene or styrene-butadiene polymers or mixtures thereof.
5. A method as claimed in any preceding claim, wherein the fabric comprises polypropylene.
6. A method as claimed in any preceding claim, wherein the coagulated polymer is foamed.
7. A method as claimed in any preceding claim, wherein the coagulated polymer is foamed by using a chemical foaming agent.
8. A method as claimed in claim 7, wherein the foaming agent comprises a low boiling water insoluble halogenated hydrocarbon.
9. A method as claimed in claim 8, wherein the foaming agent has a boiling point in the range from -40 C to 500C.
10. A method as claimed in claim 8 or claim 9, wherein the foaming agent has a boiling point in the range from -20 C to 300C.
11. A method as claimed in any of claims 7 to 10, wherein the foaming agent comprises 1,2-dibromo-1,1,2,2-tetrafluoroethane and trichlorofluoroethane.
12. A method as claimed in any preceding claim, wherein the polymer is coagulated by heating the polymer in the presence of a heat coagulant.
13. A method as claimed in claim 12, wherein the heat coagulant includes any of the following:- vinyl alkyl ether and derivatives thereof, polyacetals, polythio ethers, poly(ethylene oxide) and derivatives thereof, and poly(propylene/ethylene oxide) and derivatives thereof.
14. A method as claimed in any of claims 1 to 10, wherein the polymer is coagulated by adding an electrolyte to the polymer latex and/or varying the pH of the polymer latex.
15. A method as claimed in any preceding claim, wherein the thickness of the coating is in the range from 0.5 to 20mm.
16. A phase separation fabric for use in filtration or papermaking made by the method of any of claims 1 to 15.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9408307A GB9408307D0 (en) | 1994-04-27 | 1994-04-27 | Coated fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9508577D0 GB9508577D0 (en) | 1995-06-14 |
| GB2288755A true GB2288755A (en) | 1995-11-01 |
Family
ID=10754186
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9408307A Pending GB9408307D0 (en) | 1994-04-27 | 1994-04-27 | Coated fabric |
| GB9508577A Withdrawn GB2288755A (en) | 1994-04-27 | 1995-04-27 | Coated fabric |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9408307A Pending GB9408307D0 (en) | 1994-04-27 | 1994-04-27 | Coated fabric |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0757730A1 (en) |
| AU (1) | AU690673B2 (en) |
| CA (1) | CA2188780A1 (en) |
| GB (2) | GB9408307D0 (en) |
| WO (1) | WO1995029285A2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0819793A1 (en) * | 1996-07-18 | 1998-01-21 | FAD - Fabriano Autoadesivi S.p.A. | Filtering medium in the form of a sheet of paper for filters for fluids in general |
| FR2752173A1 (en) * | 1996-08-09 | 1998-02-13 | Scapa Group Plc | FILTRATION METHOD AND METHOD FOR MANUFACTURING FILTER USING THE SAME |
| WO1999041447A1 (en) * | 1998-02-14 | 1999-08-19 | Scapa Group Plc | Porous belts or filter cloths |
| WO1999061130A1 (en) * | 1998-05-23 | 1999-12-02 | Scapa Group Plc | Phase-separation member |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1386699A (en) * | 1971-05-05 | 1975-03-12 | Hoechst Ag | Non-woven textile fabrics |
| GB1391666A (en) * | 1971-06-28 | 1975-04-23 | Roehm Gmbh | Non-woven fabrics |
| US3936544A (en) * | 1973-05-10 | 1976-02-03 | Feldmuehle Aktiengesellschaft | Process for the manufacture of flat-shaped articles |
| GB1436937A (en) * | 1974-03-30 | 1976-05-26 | Bayer Ag | Pre-treatment of non-wovens |
| US4144209A (en) * | 1973-02-01 | 1979-03-13 | Johnson & Johnson | Resin latex compositions |
| EP0167189A1 (en) * | 1984-06-04 | 1986-01-08 | Stahl Holland B.V. | A process for the preparation of a coagulé |
Family Cites Families (3)
| 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 |
| US4429000A (en) * | 1979-12-11 | 1984-01-31 | Toray Industries, Inc. | Moisture-permeable waterproof coated fabric and method of making the same |
-
1994
- 1994-04-27 GB GB9408307A patent/GB9408307D0/en active Pending
-
1995
- 1995-04-26 AU AU23148/95A patent/AU690673B2/en not_active Ceased
- 1995-04-26 CA CA 2188780 patent/CA2188780A1/en not_active Abandoned
- 1995-04-26 EP EP95916779A patent/EP0757730A1/en not_active Withdrawn
- 1995-04-26 WO PCT/GB1995/000961 patent/WO1995029285A2/en not_active Ceased
- 1995-04-27 GB GB9508577A patent/GB2288755A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1386699A (en) * | 1971-05-05 | 1975-03-12 | Hoechst Ag | Non-woven textile fabrics |
| GB1391666A (en) * | 1971-06-28 | 1975-04-23 | Roehm Gmbh | Non-woven fabrics |
| US4144209A (en) * | 1973-02-01 | 1979-03-13 | Johnson & Johnson | Resin latex compositions |
| US3936544A (en) * | 1973-05-10 | 1976-02-03 | Feldmuehle Aktiengesellschaft | Process for the manufacture of flat-shaped articles |
| GB1436937A (en) * | 1974-03-30 | 1976-05-26 | Bayer Ag | Pre-treatment of non-wovens |
| EP0167189A1 (en) * | 1984-06-04 | 1986-01-08 | Stahl Holland B.V. | A process for the preparation of a coagulé |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0819793A1 (en) * | 1996-07-18 | 1998-01-21 | FAD - Fabriano Autoadesivi S.p.A. | Filtering medium in the form of a sheet of paper for filters for fluids in general |
| FR2752173A1 (en) * | 1996-08-09 | 1998-02-13 | Scapa Group Plc | FILTRATION METHOD AND METHOD FOR MANUFACTURING FILTER USING THE SAME |
| WO1999041447A1 (en) * | 1998-02-14 | 1999-08-19 | Scapa Group Plc | Porous belts or filter cloths |
| WO1999061130A1 (en) * | 1998-05-23 | 1999-12-02 | Scapa Group Plc | Phase-separation member |
| AU742904B2 (en) * | 1998-05-23 | 2002-01-17 | Madison Filter 981 Limited | Phase-separation member |
| US6648147B1 (en) | 1998-05-23 | 2003-11-18 | Madison Filter 981 Limited | Phase-separation member |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9508577D0 (en) | 1995-06-14 |
| CA2188780A1 (en) | 1995-11-02 |
| GB9408307D0 (en) | 1994-06-15 |
| WO1995029285A2 (en) | 1995-11-02 |
| WO1995029285A3 (en) | 1995-12-07 |
| EP0757730A1 (en) | 1997-02-12 |
| AU2314895A (en) | 1995-11-16 |
| AU690673B2 (en) | 1998-04-30 |
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| Date | Code | Title | Description |
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| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |