WO2001074552A1 - Coated wire fabrics and methods for the production thereof - Google Patents

Coated wire fabrics and methods for the production thereof Download PDF

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Publication number
WO2001074552A1
WO2001074552A1 PCT/GB2001/001446 GB0101446W WO0174552A1 WO 2001074552 A1 WO2001074552 A1 WO 2001074552A1 GB 0101446 W GB0101446 W GB 0101446W WO 0174552 A1 WO0174552 A1 WO 0174552A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire fabric
coating
coated
coated wire
fabric
Prior art date
Application number
PCT/GB2001/001446
Other languages
French (fr)
Inventor
Alisdair Mcqueen
Original Assignee
Carrington Performance Fabrics 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 GB0008053A external-priority patent/GB0008053D0/en
Priority claimed from GB0016599A external-priority patent/GB0016599D0/en
Application filed by Carrington Performance Fabrics Limited filed Critical Carrington Performance Fabrics Limited
Priority to AU42642/01A priority Critical patent/AU4264201A/en
Publication of WO2001074552A1 publication Critical patent/WO2001074552A1/en

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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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B29C70/882—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding
    • B29C70/885—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding with incorporated metallic wires, nets, films or plates
    • 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
    • D06N3/0088—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 directly applying the resin
    • 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
    • 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
    • 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
    • D06N2205/00—Condition, form or state of the materials
    • D06N2205/06—Melt
    • 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
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1628—Dimensional stability
    • 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
    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles

Definitions

  • This invention relates to coated wire fabrics and methods for the
  • the invention also provides application areas and
  • European Patent EP 0 879 001 discloses a stab resistant insert which
  • the steel cords together have two or more twisting angles
  • the stab resistant fabric is intended to be used as an insert in
  • steel fabric has to be used in this way: it would be advantageous if a coated stab resistant fabric could be manufactured, so that the stab resistant fabric forms in integral part of a protective sheeting, curtain or like material.
  • the present invention overcomes this problem, and provides a
  • the present invention also provides polymer coated wire fabrics,
  • the coatings being sufficient to encase the wire fabric therein, and to
  • the first and second coatings are applied by
  • the step of coating the second surface of the wire fabric may
  • Calendar rollers can be used, and it is advantageous that
  • the step of coating the first surface of the wire fabric may comprise
  • the carrier substrate may be coated by applying a film of the hot melt
  • calendar rollers that can be used to coat the second surface of the wire
  • the first coating may be of a weight in the range 150 to 300 gm "2 .
  • the second coating may be of a weight in the range 600 to 900 gm "2 .
  • a third coating of the hot melt polymer may be applied as a top coat.
  • the third coating may be of a weight in the range 70 to 200 gm '2 .
  • a lacquer layer may be applied to a surface of the coated wire fabric.
  • the wire fabric may comprise woven, knitted or twisted wires and
  • Wire fabrics may be stab resistant.
  • the wires may be woven as warp and weft threads or warp or weft
  • the hot melt thermoplastic polymer may be selected from the list
  • urethanes vinyl chlorides, olefins, PVDF or other suitable polymers.
  • coated wire fabric comprising a wire fabric coated with a hot melt
  • thermoplastic polymer so as to enable the wire within the polymer and to
  • the coated wire fabric may further comprise a lacquer layer.
  • the hot melt thermoplastic polymer may be selected from the list of
  • the wire fabric may be stab resistant.
  • the wire fabric may comprise woven, knitted or twisted wires.
  • wires may be woven as warp and weft threads or warp or weft threads
  • the wire fabric may comprise the fabric disclosed in EP 0 879 001 ,
  • each of said steel cords comprising a
  • each of said steel filaments forming a twisting angle with the longitudinal axis of said steel
  • said steel cord having two or more of such twisting angles which are
  • coated wire fabric may comprise a curtain acting as a closure for a vehicle.
  • the coated wire fabric may form part of, or comprise, a raft, oil
  • coated wire fabric may form part of, or comprise, walling, roofing, a tent,
  • the storage tank may be a fuel tank or water storage tank.
  • Figure 1 is a schematic diagram of the coating apparatus; and Figure 2 is a cross sectional diagram of coated wire fabric.
  • wire fabrics which are coated by the method of the invention can be any wire fabrics which are coated by the method of the invention.
  • wires comprise woven, knitted or twisted wires, such as steel cords.
  • the wires are woven, knitted or twisted wires, such as steel cords.
  • the wire fabric can comprise, for
  • galvanised filaments twisted together to produce warp and weft
  • the fabric can be produced by weaving or knitting the wire
  • woven base is pre-treated on a stenter with a high concentration of a
  • the coating of a hot melt polymer which can be based on
  • thermoplastic polymers such as urethanes, vinyl chlorides, olefins, PVDF or
  • pigment master batch for an appropriate period of time, typically two
  • the coating is one that allows itself to be melted and cast into a film
  • a coating is extruded into a gap created by hot calendar rollers 14, 16 at temperatures between 120 and 200°C to form a
  • This film between 150 g/m 2 to 300 g/m 2 . This film is laminated onto a woven
  • calendar rollers 14, 16 allow the holt melt coating to be formed into a film
  • the extrusion of the holt melt polymer is performed using
  • a heated barrel 12 containing a tightly fitting heated screw (not shown).
  • the heated screw generates heat and shear designed to melt the solid
  • the coated fabric is then trimmed to an appropriate width using a hot
  • the coated fabric is broken down into lengths slightly greater than
  • the fabric is batched onto 3" internal diameter cores.
  • coated carrier roll 20 The carrier roll 20 is joined to the hot melt calendar
  • the coating covers the wire threads and also
  • coated wire fabric and carrier fabric are wound together on a
  • the carrier fabric is then stripped from the coated wire fabric using
  • the unsupported wire fabric is then given a final lacquer finish on the
  • the applied coating weight is between
  • edges of the coated wire fabric can be trimmed using
  • the final stage is to inspect and wrap the product prior to delivery.
  • the coated wire fabric product is strong, dimensionally stable and
  • Figure 2 shows a cross sectional view of coated wire fabric 30 according to the invention. There are numerous applications for the coated wire fabrics of the
  • Still another broad area of application relates to architectural uses of
  • coated wire fabric such as for walling, roofing, or other protective layers
  • fabrics of the present invention are flexible and stab resistant. Generally,
  • the curtain comprises a sheet of coated wire fabric according to the
  • securing means such as straps and buckles, which secures the container

Abstract

A wire fabric (10) coated with a hot melt polymer so as to encase the wire within the polymer and to fill any gaps in the structure of the wire fabric, thereby providing a monolithic coated wire fabric. The fabric is formed by coating firstly one side of the wire fabric with a first coating of hot melt polymer and then coating the opposed surface of the wire fabric with a second coating of hot melt polymer such that the two coatings bond together.

Description

COATED WIRE FABRICS AND METHODS FOR THE PRODUCTION THEREOF
This invention relates to coated wire fabrics and methods for the
production thereof, with particular, but not exclusive, reference to stab
resistant wire fabrics. The invention also provides application areas and
uses for said coated wire fabrics.
European Patent EP 0 879 001 discloses a stab resistant insert which
comprises a fabric made from a plurality of steel cords, each cord having a
number of steel filaments which form a twisting angle with a longitudinal
axis of the cord. The steel cords together have two or more twisting angles
which are substantially different from each other. The resistance of the
steel filaments to a stabbing blow from a knife or like instrument is
dependent on the angle between the direction of the stabbing motion and
filament, and is smallest when this angle is 90°- By providing a number of
different twisting angles, it is possible to ensure that, irrespective of the
direction of the stabbing motion, at least some of the steel cords are not at
90° with respect to the stabbing motion and therefore provide adequate stab
resistance.
The stab resistant fabric is intended to be used as an insert in
protective textiles such as vests. It is a disadvantage that the stab resistant
steel fabric has to be used in this way: it would be advantageous if a coated stab resistant fabric could be manufactured, so that the stab resistant fabric forms in integral part of a protective sheeting, curtain or like material.
However it is very difficult to provide such a protective sheeting, since it is
very difficult to coat the stab resistant fabric, owing to the relatively large
gaps that exist between the warp and weft of the fabric. In other words,
it is difficult to fill the gaps in a coating process.
The present invention overcomes this problem, and provides a
method for coating stab resistant fabrics of the type disclosed in EP 0 879
001 . It should be noted that the invention is not limited to stab resistant
fabrics of EP 0 879 001 : rather, other forms of stab resistant wire fabrics -
and even non stab resistant wire fabrics - might be coated using the
method. The present invention also provides polymer coated wire fabrics,
and numerous uses therefor.
According to a first aspect of the invention there is provided a
method of coating a wire fabric comprising the steps of:
coating a first surface of the wire fabric with a first coating of a hot
melt thermoplastic polymer;
coating a second, opposed surface of the wire fabric with a second
coating of the hot melt thermoplastic polymer such that the two coatings
bond to each other;
the coatings being sufficient to encase the wire fabric therein, and to
fill any gaps in the structure of the wire fabric, thereby providing a
monolithic coated wire fabric. In this way, it is possible to completely coat the wire fabric, filling up
any gaps in the wire structure, even if these gaps are relatively large ones.
Advantageously, the first and second coatings are applied by
lamination. The step of coating the second surface of the wire fabric may
comprise applying a film of the hot melt polymer to the second surface
using rollers. Calendar rollers can be used, and it is advantageous that
single set of calendar rollers can be used to perform all of the required
coating steps.
The step of coating the first surface of the wire fabric may comprise
coating a carrier substrate with the hot melt polymer, bringing the coated
carrier substrate into contact with the first surface of the wire fabric, and
removing the carrier substrate from the first surface. The carrier substrate
may be removed after the wire fabric is coated with the second coating.
The carrier substrate may be coated by applying a film of the hot melt
polymer to the second surface using rollers. These can be the same
calendar rollers that can be used to coat the second surface of the wire
fabric.
The first coating may be of a weight in the range 150 to 300 gm"2.
The second coating may be of a weight in the range 600 to 900 gm"2.
A third coating of the hot melt polymer may be applied as a top coat.
The third coating may be of a weight in the range 70 to 200 gm'2.
A lacquer layer may be applied to a surface of the coated wire fabric. The wire fabric may comprise woven, knitted or twisted wires and
may be in any predetermined woven or knitted structure.
Wire fabrics may be stab resistant.
The wires may be woven as warp and weft threads or warp or weft
threads alone.
The hot melt thermoplastic polymer may be selected from the list
urethanes, vinyl chlorides, olefins, PVDF or other suitable polymers.
According to a second aspect of the invention there is provided a
coated wire fabric comprising a wire fabric coated with a hot melt
thermoplastic polymer so as to enable the wire within the polymer and to
fill any gaps in the structure of the wire fabric, thereby providing a
monolithic coated wire fabric.
The coated wire fabric may further comprise a lacquer layer.
The hot melt thermoplastic polymer may be selected from the list of
urethanes, vinyl chlorides, olefins, PVDF or the like.
The wire fabric may be stab resistant.
The wire fabric may comprise woven, knitted or twisted wires. The
wires may be woven as warp and weft threads or warp or weft threads
alone.
The wire fabric may comprise the fabric disclosed in EP 0 879 001 ,
i.e. a plurality of steel cords, each of said steel cords comprising a
longitudinal axis and two or more steel filaments, each of said steel filaments forming a twisting angle with the longitudinal axis of said steel
cord, said steel cords having two or more of such twisting angles which are
substantially different from each other.
According to a third aspect of the invention there is provided the use
of a coated wire fabric as hereinbefore defined as a curtain or shutter. The
coated wire fabric may comprise a curtain acting as a closure for a vehicle.
According to a fourth aspect of the invention there is provided the
use of a coated wire fabric as hereinbefore defined in a marine application.
The coated wire fabric may form part of, or comprise, a raft, oil
boom, cargo net, reinforcing barrier or hovercraft skirt.
According to a fifth aspect of the invention there is provided an
architectural use of a coated wire fabric as hereinbefore defined. The
coated wire fabric may form part of, or comprise, walling, roofing, a tent,
a marquee, or other protective layers.
According to a sixth aspect of the invention there is provided a
flexible storage tank comprising a coated wire fabric as hereinbefore
defined. The storage tank may be a fuel tank or water storage tank.
According to a seventh aspect of the invention there is provided a
cargo hold comprising a coated wire fabric as hereinbefore defined.
Coated wire fabrics and methods for the production thereof will now
be described with reference to the accompanying drawings, in which:-
Figure 1 is a schematic diagram of the coating apparatus; and Figure 2 is a cross sectional diagram of coated wire fabric.
The wire fabrics which are coated by the method of the invention can
" comprise woven, knitted or twisted wires, such as steel cords. The wires
can be twisted together to produce warp and weft threads. An example of
a suitable wire fabric is described in European Patent EP 0 879 001 , the
contents of which are herein incorporated by reference, although the
invention is not limited in this regard. The wire fabric can comprise, for
example, galvanised filaments twisted together to produce warp and weft
threads. The fabric can be produced by weaving or knitting the wire
threads together.
A woven substrate 10 based on synthetic or natural yarns or a non-
woven base is pre-treated on a stenter with a high concentration of a
suitable water and oil repellent finish. This acts as a carrier fabric for the
wire fabric through the coating process.
The coating of a hot melt polymer, which can be based on
thermoplastic polymers such as urethanes, vinyl chlorides, olefins, PVDF or
other suitable polymers is dried and blended, if appropriate, with a quantity
of pigment master batch, for an appropriate period of time, typically two
hours. The coating is one that allows itself to be melted and cast into a film
which solidifies on cooling. The process is repeatable many times without
loss of properties or characteristics.
As shown in Figure 1 a coating is extruded into a gap created by hot calendar rollers 14, 16 at temperatures between 120 and 200°C to form a
film between 150 g/m2 to 300 g/m2. This film is laminated onto a woven
carrier fabric. The process is repeated to the required thickness. Two
calendar rollers 14, 16 allow the holt melt coating to be formed into a film
of predetermined thickness. The film is then laminated onto a suitable
substrate that removes the film from the calendar roller. This is a
continuous coating and laminating process. It is possible to employ more
than two calendar rollers: such variations are well known to those skilled in
the coating art. The extrusion of the holt melt polymer is performed using
a heated barrel 12 containing a tightly fitting heated screw (not shown).
The heated screw generates heat and shear designed to melt the solid
coating into a flowing malleable resin.
The coated fabric is then trimmed to an appropriate width using a hot
knife to ensure proper edge sealing.
The coated fabric is broken down into lengths slightly greater than
the supplied wire. The fabric is batched onto 3" internal diameter cores.
Using a modified frame the reel of wire fabric 18 is batched above a
coated carrier roll 20. The carrier roll 20 is joined to the hot melt calendar
machine leader fabric and then the wire fabric is taped to the coated carrier.
Independent breaking units ensure that both materials have adequate
running tension and are free from creasing.
Both fabrics come together prior to laminating rolls 14, 16 where a weight of coating between 600 g/m2 to 900 g/m2 is cast at a temperature
between 120 and 200°C. The coating covers the wire threads and also
strikes through the holes, melting the coating on the carrier fabric and
thereby physically bonding to it.
The coated wire fabric and carrier fabric are wound together on a
single frame 24.
The process is repeated whereby a further topcoat between 70 g/m2
to 200 g/m2 is applied to the surface of the bonded wire fabric.
The carrier fabric is then stripped from the coated wire fabric using
a standard rewind table. The carrier is cleaned and re-batched ready for re-
use at a later date.
The unsupported wire fabric is then given a final lacquer finish on the
hot melt calendar coating machine at processing temperatures between 120
and 200°C. The side that was originally cast onto the woven carrier is the
side that is given the final coating. The applied coating weight is between
70 g/m2 to 200 g/m2.
The edges of the coated wire fabric can be trimmed using
conventional slitting technologies.
The final stage is to inspect and wrap the product prior to delivery.
The coated wire fabric product is strong, dimensionally stable and
solid, weatherproof yet flexible, and can be stab resistant. Figure 2 shows a cross sectional view of coated wire fabric 30 according to the invention. There are numerous applications for the coated wire fabrics of the
invention, which can be used with advantage for these applications, owing
to its advantageous properties. For example, there are potential military
applications, such as shelters, rafts and flexible storage tanks. It should be
noted that such items may also be used in a non-military context. Another
broad area of application relates to security, e.g. the provision of roller
shutters and cut and stab resistant curtains. Another broad area of
application still relates to marine applications, such as in the manufacture
of life rafts, oil booms, cargo nets, reinforcing barriers and hovercraft skirts.
Yet another broad area of application relates to various storage applications,
such as the provision of flexible fuel or water tanks, cargo holds and trailer
curtains.
Still another broad area of application relates to architectural uses of
coated wire fabric, such as for walling, roofing, or other protective layers
and in the fabrication of tents and marquees, wherein the coated wire fabric
of the present invention can advantageously replace traditional materials
such as tarpaulin. Further applications include use as advertising banners,
and as reservoir/landfill covers.
In all of these application areas, there are advantages associated with
the combination of toughness, durability and flexibility provided by fabrics
of the present invention. In numerous applications, such as those described
above relating to security, and in the provision of trailer curtains, it is a further and considerable advantage that stab resistant fabrics of the present
invention can be provided. For example, fabrics of the present invention
can be used as a curtain which acts as a closure for a vehicle such as a
lorry, HGV or a trailer for such vehicles. It is a commonly encountered
problem with such vehicles that thieves slash the curtain used to close such
vehicles with knives or like cutting instruments and thereby gain entry to
the contents of the vehicle. Another problem is that such curtains are
slashed in order to allow illegal immigrants to hide themselves within the
vehicle in order to gain illegal entry into a country into which the vehicle is
transported. Thus, it is highly advantageous in such applications that
fabrics of the present invention are flexible and stab resistant. Generally,
the curtain comprises a sheet of coated wire fabric according to the
invention, means to suspend the curtain from a portion of the container, and
securing means, such as straps and buckles, which secures the container
in place.

Claims

1. A method of coating a wire fabric comprising the steps of:
coating a first surface of the wire fabric with a first coating of a hot
melt polymer;
coating a second, opposed surface of the wire fabric with a second
coating of the hot melt thermoplastic polymer such that the two coatings
bond to each other;
the coatings being sufficient to encase the wire fabric therein, and to
fill any gaps in the structure of the wire fabric, thereby providing a
monolithic coated wire fabric.
2. A method according to claim 1 in which the first and second coatings
are applied by lamination.
3. A method according to claim 2 in which the step of coating the
second surface of the wire fabric comprises applying a film of the hot melt
thermoplastic polymer to the second surface using rollers.
4. A method according to claim 2 or claim 3 in which the step of coating
the first surface of the wire fabric comprises coating a carrier substrate with
the hot melt polymer, bringing the coated carrier substrate into contact with
the first surface of the wire fabric, and removing the carrier substrate from
the first surface.
5. A method according to claim 4 in which the carrier substrate is
removed after the wire fabric is coated with the second coating.
6. A method according to any of claims 3 to 5 in which the carrier
substrate is coated by applying a film of the hot melt polymer to the second
surface using rollers.
7. A method according to any of the previous claims in which the first
coating is of a weight in the range of 150 to 300 gm"2.
8. A method according to any of the previous claims in which the
second coating is of a weight in the range 600 to 900 gm"2.
9. A method according to any of the previous claims in which a third
coating of the hot melt polymer is applied as a top coat.
10. A method according to claim 9 in which the third coating is of a
weight in the range 70 to 200 gm"2.
1 1 . A method according to any of the previous claims in which a lacquer
layer is applied to a surface of the coated wire fabric.
12. A method according to any of the previous claims in which the wire
fabric comprises woven, knitted or twisted wires.
13. A method according to any of the previous claims in which the wire
fabric is stab resistant.
14. A method according to claim 12 or claim 13 in which the wires are
woven as warp and weft threads.
15. A method according to any of the previous claims in which the hot
melt thermoplastic polymer is selected from the list urethanes, vinyl
chlorides, olefins, PVDF or the like.
16. A coated wire fabric comprising a wire fabric coated with a holt melt
polymer so as to encase the wire within the polymer and to fill any gaps in
the structure of the wire fabric, thereby providing a monolithic coated wire
fabric.
17. A coated wire fabric according to claim 16 further comprising a
lacquer layer.
18. A coated wire fabric according to claim 16 or claim 17 in which the
hot melt thermoplastic polymer is selected from the list urethanes, vinyl
chlorides, olefins PVDF or the like.
19. A coated wire fabric according to any of claims 16 to 18 in which the
wire fabric is stab resistant.
20. A coated wire fabric according to any of claims 16 to 19 in which the
wire fabric comprises woven, knitted or twisted wires.
21. A coated wire fabric according to claim 20 in which the wires are
woven as warp and weft threads or warp or weft threads alone.
22. A coated wire fabric according to any of claims 16 to 21 in which the
wire fabric comprises a plurality of steel cords, each of said steel cords
comprising a longitudinal axis and two or more steel filaments, each of said
steel filaments forming a twisting angle with the longitudinal axis of said
steel cord, said steel cords having two or more such twisting angles which
are substantially different from each other.
23. Use of a coated wire fabric according to any of claims 16 to 22 as a curtain or shutter.
24. Use according to claim 23 in which the coated wire fabric comprises
a curtain acting as a closure for a vehicle.
25. Use of a coated wire fabric according to any of claims 16 to 22 in a
marine application.
26. Use according to claim 25 in which the coated wire fabric forms part
of, or comprises, a raft, oil boom, cargo net, reinforcing barrier or hovercraft
skirt.
27. Architectural use of a coated wire fabric according to any of claims
16 to 22.
28. Use according to claim 27 in which the coated wire fabric forms part
of, or comprises walling, roofing, a tent or a marquee.
29. A flexible storage tank comprising a coated wire fabric according to
any of claims 16 to 22.
30. A flexible fuel tank according to claim 29.
31. A flexible water storage tank according to claim 29.
32. A cargo hold comprising a coated wire fabric according to any of
claims 16 to 22.
PCT/GB2001/001446 2000-04-03 2001-04-02 Coated wire fabrics and methods for the production thereof WO2001074552A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU42642/01A AU4264201A (en) 2000-04-03 2001-04-02 Coated wire fabrics and methods for the production thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0008053A GB0008053D0 (en) 2000-04-03 2000-04-03 Coated wire fabrics and methods for the production thereof
GB0008053.1 2000-04-03
GB0016599.3 2000-07-07
GB0016599A GB0016599D0 (en) 2000-07-07 2000-07-07 Coated wire containing fabrics and methods for the production thereof

Publications (1)

Publication Number Publication Date
WO2001074552A1 true WO2001074552A1 (en) 2001-10-11

Family

ID=26244018

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Application Number Title Priority Date Filing Date
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Country Status (2)

Country Link
AU (1) AU4264201A (en)
WO (1) WO2001074552A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003033246A1 (en) * 2001-10-17 2003-04-24 Robic Twisted wire reinforced layer
US7144625B2 (en) 2000-09-06 2006-12-05 George Tunis Wire reinforced thermoplastic coating
WO2008119001A1 (en) * 2007-03-28 2008-10-02 Honeywell International Inc. Method to apply multiple coatings to a fiber web
US7926524B2 (en) 2006-10-02 2011-04-19 Prolam, Societe En Commandite Utilization of coloration to improve the detection of “hit or miss” defects when using scanner equipment and an automated saw to remove defects in wood pieces

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3297461A (en) * 1963-05-10 1967-01-10 Us Stoneware Inc Reinforced plastic sheeting
EP0478258A2 (en) * 1990-09-25 1992-04-01 Sumitomo Rubber Industries Limited Method and apparatus for fabricating a rubberised steel cord reinforced sheet
EP0879001B1 (en) * 1996-02-01 2000-01-19 N.V. Bekaert S.A. Stab-resistant insert for protective textile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3297461A (en) * 1963-05-10 1967-01-10 Us Stoneware Inc Reinforced plastic sheeting
EP0478258A2 (en) * 1990-09-25 1992-04-01 Sumitomo Rubber Industries Limited Method and apparatus for fabricating a rubberised steel cord reinforced sheet
EP0879001B1 (en) * 1996-02-01 2000-01-19 N.V. Bekaert S.A. Stab-resistant insert for protective textile

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7144625B2 (en) 2000-09-06 2006-12-05 George Tunis Wire reinforced thermoplastic coating
US7200973B2 (en) 2000-09-06 2007-04-10 George Tunis Wire reinforced thermoplastic coating
WO2003033246A1 (en) * 2001-10-17 2003-04-24 Robic Twisted wire reinforced layer
US7926524B2 (en) 2006-10-02 2011-04-19 Prolam, Societe En Commandite Utilization of coloration to improve the detection of “hit or miss” defects when using scanner equipment and an automated saw to remove defects in wood pieces
WO2008119001A1 (en) * 2007-03-28 2008-10-02 Honeywell International Inc. Method to apply multiple coatings to a fiber web
US8491746B2 (en) 2007-03-28 2013-07-23 Honeywell International Inc. Method to apply multiple coatings to a fiber web
US9200874B2 (en) 2007-03-28 2015-12-01 Honeywell International Inc. Method to apply multiple coatings to a fiber web

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