GB2285935A - Wear-resistant reticular polymer-coated industrial fabric by transfer coating from release paper - Google Patents

Wear-resistant reticular polymer-coated industrial fabric by transfer coating from release paper Download PDF

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Publication number
GB2285935A
GB2285935A GB9501500A GB9501500A GB2285935A GB 2285935 A GB2285935 A GB 2285935A GB 9501500 A GB9501500 A GB 9501500A GB 9501500 A GB9501500 A GB 9501500A GB 2285935 A GB2285935 A GB 2285935A
Authority
GB
United Kingdom
Prior art keywords
industrial fabric
polymer
fabric
making
coated
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
GB9501500A
Other versions
GB2285935B (en
GB9501500D0 (en
Inventor
Ian Christison Sayers
Craig Valentine
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
Priority claimed from GB9401902A external-priority patent/GB9401902D0/en
Application filed by Scapa Group Ltd filed Critical Scapa Group Ltd
Priority to GB9501500A priority Critical patent/GB2285935B/en
Publication of GB9501500D0 publication Critical patent/GB9501500D0/en
Publication of GB2285935A publication Critical patent/GB2285935A/en
Application granted granted Critical
Publication of GB2285935B publication Critical patent/GB2285935B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • 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
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
    • 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
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
    • D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
    • 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
    • D06N3/12—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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/06—Angles

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

An industrial fabric 11 is coated with a wear-resistant reticular film-forming polymer by transfer coating from a release paper 14, fed at an angle of 35 - 55 DEG from roller 15, whilst passing around heated roller 12. A compaction roller 17 may be used to force the coating into the fabric. The coating may be an epoxy resin, plastisol or aqueous polyurethane. The release paper may be silicone, aluminium foil, polyethylene or PTFE-coated non-woven fabric. The fabric may be used as papermachine clothing, press felts, corrugator belts, or filter cloths. <IMAGE>

Description

INDUSTRIAL FABRIC The present invention relates to industrial fabrics such as papermachine clothing or like fabrics.
When in use industrial fabrics suffer from the problems of fibre shedding and wear. The present invention seeks to address these problems.
One known method of surface modification for industrial fabrics such as corrugator belts comprises the lick-roll application of water-based acrylic polymer. This process is not particularly reliable.
According to a first aspect of the present invention there is provided a method of making an industrial fabric including the steps of providing a textile substrate1 providing a film forming polymer affixed to a release sheet, applying said polymer to a surface of the base cloth, curing the polymer and removing the release sheet so as to provide an industrial fabric having a textile substrate, at least one surface of which is coated with and/or is impregnated by the film forming polymer. Examples of suitable film forming polymers include epoxy resins, plastisols (i.e. a polymer dissolved in the bare minimum of solvent) or aqueous polyurethane systems.
The fabrics of the present invention have particular application as press felts. The fabrics may also be used in corrugator belts in which the polymer coating is applied at the edge regions of the fabric to increase the abrasion resistance of these areas. The fabrics are also suitable as filter cloths where the improved smoothness of the fabric surface resulting from the coating gives improved cake release.
The polymer film provides a harder more wear resistant surface having improved abrasion resistance. It also prevents fibre shedding. A further advantage, when used as a coating for papermakers fabrics, is that the improved surface smoothness reduces the start-up time required on the paper machine. Normally a fabric has initially to be run on a machine for a certain amount of time to smoothen the surface before it can be put into action.
The method of the invention may advantageously be used to provide reticular polymer coatings; i.e. coatings comprising a network of two dimensional pores thus providing permeability.
According to a second aspect of the present invention there is provided an industrial fabric conprising a textile substrate, wherein at least one surface of the textile substrate is coated with and/or is impregnated by a film forming polymer, the polymer coating being reticular.
The use of the release paper method of resin application enables the fabric heat-setting step to be combined with the resin treatment if desired, and whereas conventional coating processes utilise aqueous resin emulsion systems which require a large energy input to remove water, the method according to the invention consumes only a small amount of energy. The reticulated resin coating ensures that fibre shedding is reduced due to a more effective bedding down of protruding surface fibres. This method is also advantageous in that the absence of waste effluent or solvents means that the process is more ecologically acceptable. Further refinements include the utilisation of a more uniform of lower denier fibre batt surface.The greater fibre density at the surface, controlled by known methods such as choice of batt fibre denier and/or needling technique, enables a more uniform resin application to be achieved, thereby reducing brittleness by reducing the opportunity for resin-rich areas to form. Toughness can be improved by increasing cure time at the expense of cure temperature.
The release sheet may typically comprise silicone release paper, aluminium foil or polyethylene or PTFE-coated non-woven fabrics. The polymer would be in the form of a film.
The textile substrate may be fed over at least one roller. The release sheet would be fed into the nip between the textile and one of the rollers. The paper is held under tension to prevent creasing. The angle of application of the release sheet to the substrate/roller is preferably in the range from 35 to 55 , and more preferably is substantially 45". The angle of application is important in ensuring that a uniform resin coating is applied, and for preventing creasing of the release sheet, by ensuring that the release sheet is kept at high tension.
The rollers are preferably heated at 160-2000C depending on the polymer applied, thereby enabling the resin film to be heat cured, although it may be possible to use chemically, moisture or air-curable resins, eliminating the need for heated rollers, although some heat may be required to bring about the desired reticulation. Reticulation depends on the surface characteristics of the release sheet and the influence of heat. The surface characteristics of the release sheet can be selected such that the desired reticulation of resin on the fabric is achieved.
A compaction roller is preferably used to force resin into the fabric surface, enhancing the film smoothness. One or more layers of resin may be applied.
The reticulation of the film can be explained by the fluidisation of the resin at high temperatures which is now unable to wet out the surface of release sheet due to the low surface energy of the paper, and hence form droplets. These droplets interconnect and when applied to the fabric surface they reticulate around the surface fibres.
In order that the present invention may be more readily understood specific embodiments thereof will now be described by way of example only with reference to the accompanying drawings in which: Fig.l is a schematic diagram showing a method of making industrial fabrics in accordance with the present invention; and Fig.2 is a plan view showing the reticulation of a resin on a release sheet, the release sheet being used in the method of producing a fabric in accordance with the present invention.
Fig.l shows apparatus 10 for applying an epoxy resin coating. The textile substrate 11 is located over two large rotatable cylinders 12,13 at least one of which being heated.
An epoxy film is provided on a release paper 14. The coated release paper is mounted on a feed roller 15 and fed under tension to the nip between one of the heated drums and the textile. The coating is thus applied to the inside of the fabric belt. The used release sheet is removed as it passes out from the top of the roller and is fed to a take-up roller 16. A compaction roller 17 is optionally provided for forcing resin into the fabric surface region. The coated fabric is turned inside out after curing the resin, so that the resin coated side of the fabric is located on the outside of the belt, i.e. the paper side.
Fig.2 shows a release sheet for providing a fabric with a reticulated coating of epoxy adhesive. The resin coating on the release paper and thus the applied fabric coating have apertures therethrough. These apertures in the resin coating on the fabric expose the fabric located below, thus providing a permeable coating.
EXAMPLE A sample was obtained by coating a needled press felt with Fibredux 913G, (RTM of Ciba Composites) comprising a water-insoluble polyfunctional epoxy resin (containing modified dicyandiamide) cast on a release sheet to give a film of 34 g/m2 thickness, using a roller temperature of 120-1600C, and compaction roller pressure of ca. 20kg/cm2.
The fabric treated with two resin layers was found to have an air permeability of 59.5 (64) cfm, retained 95.7 (85.7)% original thickness after 5000 rubs against a standard carborundum sandscreen at 21 oz pressure, RD surface roughness of 28 (32) microns (measured using a Surcom surface profiling device) thickness of 3.47 (3.32)mm and a weight of 1505 (1361)g/M2. The figures in brackets are for an untreated sample.
It is to be understood that the above described embodiments are by way of illustration only. Many modifications and variations are possible.

Claims (10)

1. A method of making an industrial fabric including the steps of providing a textile substrate, providing a film forming polymer affixed to a release sheet, applying said polymer to a surface of the base cloth, curing the polymer and removing the release sheet so as to provide an industrial fabric having a textile substrate, at least one surface of which is coated with and/or is impregnated by the film forming polymer.
2. A method of making an industrial fabric as claimed in claim 1, characterised in that the polymer coating is reticular.
3. A method of making an industrial fabric as claimed in claim 1 or claim 2, characterised in that the polymer comprises any of the following: an epoxy resin, a plastisol or an aqueous polyurethane system.
4. A method of making an industrial fabric as claimed in any preceding claim, characterised in that the release sheet comprises any of the following: silicone release paper, aluminium foil, polyethylene or PTFE-coated non-woven fabric.
5. A method of making an industrial fabric as claimed in any preceding claim, characterised in that the polymer coated release sheet is fed to the textile substrate at an angle in the range from 35 to 55 .
6. A method of making an industrial fabric as claimed in any preceding claim, characterised in that the polymer coated release sheet is fed to the textile substrate at an angle of substantially 45O.
7. A method of making an industrial fabric as claimed in any preceding claim, characterised in that the polymer is heated in order to cure the polymer and/or bring reticulation.
8. A method of making an industrial fabric as claimed in any preceding claim, characterised in that the industrial fabric comprises papermachine clothing, a corrugator belt or a filter cloth.
9. An industrial fabric comprising a textile substrate, characterised in that at least one surface of the textile substrate is coated with and/or is impregnated by a film forming polymer, the polymer coating being reticular.
10. An industrial fabric as claimed in claim 9, characterised in that the industrial fabric comprises papermachine clothing, a corrugator belt or a filter cloth.
GB9501500A 1994-02-01 1995-01-26 Industrial fabric Expired - Fee Related GB2285935B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9501500A GB2285935B (en) 1994-02-01 1995-01-26 Industrial fabric

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9401902A GB9401902D0 (en) 1994-02-01 1994-02-01 Industrial fabric
GB9501500A GB2285935B (en) 1994-02-01 1995-01-26 Industrial fabric

Publications (3)

Publication Number Publication Date
GB9501500D0 GB9501500D0 (en) 1995-03-15
GB2285935A true GB2285935A (en) 1995-08-02
GB2285935B GB2285935B (en) 1998-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB9501500A Expired - Fee Related GB2285935B (en) 1994-02-01 1995-01-26 Industrial fabric

Country Status (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0885996A1 (en) * 1996-12-10 1998-12-23 Fuji Techno Co., Ltd. Processing paper for producing wet type synthetic leather and method of its application processing
WO1999018282A1 (en) * 1997-10-08 1999-04-15 Scapa Group Plc Improved industrial fabrics
DE10341670A1 (en) * 2003-09-08 2005-04-07 Henkel Kgaa Process for the surface modification of coated substrates
GB2428207A (en) * 2005-07-11 2007-01-24 Latrave Ltd Adhesive Filter Tape
ES2277702A1 (en) * 2004-06-11 2007-07-16 Esther Alvarez Moral Crystallized textile material manufacture method involves forming adding wood or plastic layers with synthetic resin on paper fiber base to form panel, adding resins which are processed to harden, and adding other resins for finishing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49108375A (en) * 1973-02-19 1974-10-15
GB1481574A (en) * 1974-01-22 1977-08-03 Bayer Ag Textile coating with polyurethanes
EP0224262A2 (en) * 1985-11-27 1987-06-03 E.I. Du Pont De Nemours And Company Fluoropolymer-coated textile material
US4675211A (en) * 1983-04-13 1987-06-23 Bayer Aktiengesellschaft Process for multiple-coat reverse coating using polyurethane solutions
WO1988005686A1 (en) * 1987-01-29 1988-08-11 Parker Hannifin Corporation Microporous asymmetric polyamide membranes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157424A (en) * 1964-08-13 1979-06-05 Porvair Limited Production of porous materials
US4003777A (en) * 1967-09-12 1977-01-18 Eddy Robert G Method of forming a laminated structure
FR2528896A1 (en) * 1982-06-18 1983-12-23 Gerland Sa CONTINUOUS PROCESS FOR OBTAINING DECORATED PLASTIC COATINGS FOR FLOORS OR WALLS AND INSTALLATION PROVIDED FOR THE IMPLEMENTATION OF THIS PROCESS AND COATINGS OBTAINED
US4900608A (en) * 1988-04-04 1990-02-13 Gencorp Inc. Flexible epoxy-coated fabric
JPH0635712B2 (en) * 1989-09-06 1994-05-11 鐘紡株式会社 Artificial leather excellent in moisture permeability, flexibility and mechanical strength and method for producing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49108375A (en) * 1973-02-19 1974-10-15
GB1481574A (en) * 1974-01-22 1977-08-03 Bayer Ag Textile coating with polyurethanes
US4675211A (en) * 1983-04-13 1987-06-23 Bayer Aktiengesellschaft Process for multiple-coat reverse coating using polyurethane solutions
EP0224262A2 (en) * 1985-11-27 1987-06-03 E.I. Du Pont De Nemours And Company Fluoropolymer-coated textile material
WO1988005686A1 (en) * 1987-01-29 1988-08-11 Parker Hannifin Corporation Microporous asymmetric polyamide membranes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0885996A1 (en) * 1996-12-10 1998-12-23 Fuji Techno Co., Ltd. Processing paper for producing wet type synthetic leather and method of its application processing
EP0885996A4 (en) * 1996-12-10 2001-12-19 Fuji Techno Co Ltd Processing paper for producing wet type synthetic leather and method of its application processing
WO1999018282A1 (en) * 1997-10-08 1999-04-15 Scapa Group Plc Improved industrial fabrics
DE10341670A1 (en) * 2003-09-08 2005-04-07 Henkel Kgaa Process for the surface modification of coated substrates
ES2277702A1 (en) * 2004-06-11 2007-07-16 Esther Alvarez Moral Crystallized textile material manufacture method involves forming adding wood or plastic layers with synthetic resin on paper fiber base to form panel, adding resins which are processed to harden, and adding other resins for finishing
GB2428207A (en) * 2005-07-11 2007-01-24 Latrave Ltd Adhesive Filter Tape

Also Published As

Publication number Publication date
GB2285935B (en) 1998-06-24
GB9501500D0 (en) 1995-03-15

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050126