EP1041192A1 - Canvasses reinforced with metal members - Google Patents
Canvasses reinforced with metal members Download PDFInfo
- Publication number
- EP1041192A1 EP1041192A1 EP99200806A EP99200806A EP1041192A1 EP 1041192 A1 EP1041192 A1 EP 1041192A1 EP 99200806 A EP99200806 A EP 99200806A EP 99200806 A EP99200806 A EP 99200806A EP 1041192 A1 EP1041192 A1 EP 1041192A1
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- EP
- European Patent Office
- Prior art keywords
- metal member
- strip
- strip according
- anyone
- thermoplastic material
- 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.)
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
- D04H3/045—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles for net manufacturing
-
- 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
- D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
- D06N7/0094—Fibrous material being coated on one surface with at least one layer of an inorganic material and at least one layer of a macromolecular material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H15/00—Tents or canopies, in general
- E04H15/32—Parts, components, construction details, accessories, interior equipment, specially adapted for tents, e.g. guy-line equipment, skirts, thresholds
- E04H15/54—Covers of tents or canopies
-
- 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
- D06N2203/00—Macromolecular materials of the coating layers
- D06N2203/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N2203/042—Polyolefin (co)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
- D06N2203/00—Macromolecular materials of the coating layers
- D06N2203/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N2203/045—Vinyl (co)polymers
- D06N2203/048—Polyvinylchloride (co)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
- D06N2203/00—Macromolecular materials of the coating layers
- D06N2203/06—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06N2203/061—Polyesters
-
- 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
- D06N2203/00—Macromolecular materials of the coating layers
- D06N2203/06—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06N2203/065—Polyamides
Definitions
- the present invention relates to a fabric and to a strip for the reinforcement of canvasses having a plastic coating.
- the invention also relates to the use of a fabric and a strip for the reinforcement of canvasses having a plastic coating.
- Canvasses with a plastic coating are for example used to cover the loads on vehicles or containers, they are also used as tent material.
- Such canvasses must meet several requirements. They must be sufficient strong to avoid tearing due to movement of the load and simultaneously they must be sufficient flexible so that the canvasses can be easily and quickly slid to one side to open them. A further requirement is that they must give a good protection against vandalism and robbery. Therefore a high resistance against the action of a knife or against the action of a pair of scissors is required. Since the weight of the canvass limits the amount of load that may be transported by the vehicle or container, the weight of the canvass must be as low as possible.
- WO 98/55682 describes a fabric for the reinforcement of canvasses.
- This reinforcement consists of strips comprising a thermoplastic matrix and several parallel metal members. This gives a good flexibility and a rather good resistance against the action of a knife or a cutter. The resistance against the action of a pair of scissors achieved by this embodiment is not always sufficient.
- a fabric for the reinforcement of canvasses having a plastic coating.
- the fabric comprises a warp and a weft. At least one of the warp or the weft is formed by a strip comprising at least one elongated metal member and a matrix of a thermoplastic material.
- the thermoplastic material is adherable to the plastic coating of the canvas.
- a primer layer is applied on the metal member before the thermoplastic material is applied on said coated metal member to realise a good adhesion between the thermoplastic material and the metal member.
- the strips have a cross-sectional thickness ranging from 0.5 mm to 3 mm and a cross-sectional width ranging from 3 mm to 25 mm, preferably the thickness is between 0.5 mm and 2 mm and the width is between 3 mm and 15 mm.
- the strips forming the warp and the strips forming the weft form meshes with a maximum dimension ranging from 5 cm to 30 cm.
- the dimension of these meshes can be adapted to the kind of goods that has to be transported. In most cases a maximum dimension of about 7 cm to 15 cm is preferred.
- the strips forming the weft can be welded to the strips forming the warp or they can be fixed to each other by means of an adhesive.
- a strip for reinforcement of canvasses having a plastic coating.
- the strip comprises at least one elongated metal member and a matrix of a thermoplastic material.
- the thermoplastic material is adherable to the plastic coating of the canvas.
- a primer layer is applied on the metal member. This primer layer is required to obtain a good adhesion of the thermoplastic material to the metal member.
- Such a primer layer is applied on the surface of the metal member before the application of the thermoplastic material. When no primer layer is applied, the wire could be pulled out the strip without difficulties. Further, without the application of such a primer layer, the PVC layer flows away during the welding of the strip on the canvass. In this case the metal member is not longer surrounded by the matrix material after the welding. This would result in a fabric which is susceptible of corrosion.
- the application of a primer layer on the metal further allows it to reduce the thickness of the PVC layer. This is of great importance since the amount of PVC used, has a direct influence on the weight of the reinforced canvass. As described before, it is desirable that the weight of the canvass is as low as possible.
- the metal member must give the strip the required strength but must also enable the strip to remain sufficient flexible, preferably in all directions.
- the flexibility of the strip is strongly influenced by the type of metal member used to reinforce the strip.
- the metal member is preferably a flat wire.
- Flat wire is flexible in the direction perpendicular to the flat side of the wire. Since the flexibility is determined by the thickness of the wire, the wire is preferably less than 0.40 mm, more preferably less than 0.35 mm, for instance less than 0.30 mm. Since the resistance against the action of a pair of scissors is increased when the tensile strength is high, a tensile strength of at least 1500 N/mm 2 is preferred, more preferably the tensile strength is greater than 1700 N/mm 2 . To obtain the desired tensile strength a carbon content greater than 0.40 % is preferred. By preference, the wire is rounded off so that the cross section has no sharp corners, which could result in a damage of the canvass during welding.
- An I-profiled wire is a wire with a cross section resembling an I-shape. The thickness of the left end and the thickness of the right end are greater than the center thickness of the wire.
- This wire has the same flexibility as a flat wire with a thickness equal to the center thickness of the I-profiled wire. The resistance against the action of a pair of scissors of this I-profiled wire is improved in comparison with this flat wire. This resistance equals the resistance of a flat wire with a thickness equal to the thickness of the broader left and right end of the I-profiled wire while the weight of such an I-profiled wire is reduced compared with this flat wire.
- the metal member comprises at least two metal members. These metal members are preferably located parallel in the plane of the strip.
- the metal members could be round steel wires, square wires, rectangular wires or another type of wires.
- Each metal member is hereby in contact with at least one other metal member, so that they form together a kind of a flat wire.
- the plurality of the elongated metal members gives the strip a good flexibility. The resistance against the action of a knife or against the action of a pair of scissors is remained because of the arrangement of the metal members forming a flat wire.
- the metal member or the metal members can be coated with a metallic coating layer such as zinc or a zinc alloy comprising 2 to 10 % Al and 0.1 to 0.4 % of a rare earth element such as La and/or Ce.
- a metallic coating layer such as zinc or a zinc alloy comprising 2 to 10 % Al and 0.1 to 0.4 % of a rare earth element such as La and/or Ce.
- thermoplastic material such as PVC (polyvinylchloride) is applied on the metal member.
- the application can be done by any conventional means. Preferred application methods are extrusion, fluidised bed coating or plastisol coating.
- the adhesion of the primer to the wire surface is improved when the surface of the wire is clean. Therefore it can be desirable to degrease the wire surface before applying the primer layer.
- the application of the primer layer may be done by any conventional means.
- a first group of primers that can be used are thermosetting materials. Therefore binding agents are dissolved in an organic solvent or are dispersed with a limited amount of a dispersing agent in water to form an emulsion or a suspension. Suitable binding agents are based on acrylate, alkyd/melamine, epoxy or fenol/epoxy resins. Other binding agents giving a good adhesion to the metal and to the PVC compounds can also be used. Additives such as anticorrosion pigments, wetting agents and/or stabilising agents can be added.
- the primer composition is applied to the metal by immersing the wire into the solution, the emulsion or the suspension of the primer material; the primer composition can also be applied by spraying.
- the thickness of the wet primer layer can be calibrated by passing the wire and the primer through the calibrated opening of a die.
- the thickness of the primer layer can also be calibrated by felt wiping or by air wiping in a controled air stream.
- the thickness of the primer layer may be influenced by further diluting the primer composition. In order to allow drying and curing the wire can be heated. Since it is desirable that the weight of the canvass is as low as possible, the thickness of the primer layer must be low.
- the thickness of the dry primer layer is preferably less than 10 ⁇ m, more preferably less than 5 pm, for instance les than 1 ⁇ m. Radiation curable resins such as ultra violet, electron beam or infra red curable resins are also suitable as primer.
- a second group of primer layers that can be applied are hot melts, for example ethylene copolymers such as EVA (ethyl vinyl acetate), polyamides or polyesters.
- hot melts for example ethylene copolymers such as EVA (ethyl vinyl acetate), polyamides or polyesters.
- EVA ethyl vinyl acetate
- polyamides polyamides
- polyesters polyesters.
- EVA ethyl vinyl acetate
- This hot melt can be applied with a variety of different equipments. Very suitable is the melt pot.
- Also application by extrusion is possible under certain conditions. A method for the application by extrusion is described in the patent specification BE 1006346.
- primer layers with a thickness of less than 25 ⁇ m, for instance less than 5 ⁇ m are obtained.
- a third group are silane-compounds. These are bifunctional molecules : one functional group is responsible for the binding with the metal(oxides), the other functional group reacts with the polymer. More details about these silane compound can be found in the PCT application with the application number PCT/BE98/0015. Usually the silane compounds are diluted in alcohols, although they can be diluted in other solvents or in water as well. With this type of compounds very thin primer layers with a thickness of 20 nm or even less can be achieved.
- the adhesion between the thermoplastic material and the metal member can be evaluated by carrying out the following test.
- the PVC layer is removed in the longitudinal direction over about 5 cm by means of the sharp side of a knife.
- the blunt side of the knife the PVC layer is slightly lifted.
- the synthetic coating is tried to be pulled off the metal member with the fingers. The more difficult the PVC layer can be pulled off, the stronger the adhesion of the PVC to the metal member.
- the test is carried out both on a wire on which a PVC layer is extruded directly and on a wire coated with a primer layer before the extrusion of the PVC layer.
- the PVC coating, extruded directly on the metal member can be pulled off easily, while the removal of the PVC coating is much more difficult when a primer layer is applied on the metal member.
- thermoplastic material is applied on the metal member.
- thermoplastic material must give a good adhesion to the canvass. Since canvasses are usually coated with PVC, the thermoplastic material is preferably a PVC compound, although other thermoplastic materials with a good adhesion to PVC can be used as well. Canvasses can also be made of polypropylene, polyethylene or of polyester. In these cases one chooses a thermoplastic material which gives a good adhesion to this polymers.
- FIG. 1 shows an embodiment of a fabric according to the first aspect of the invention.
- This fabric 10 comprises strips forming the warp 12 and strips forming the weft 14.
- the strips 12 and the strips 14 are welded to each other.
- the width W of the meshes is 7.5 cm, the height H of the meshes is 15 cm.
- FIG. 2 shows a strip 16 according to the second aspect of the invention.b
- the strip comprises a hard rolled flat steel wire 18 of the type 4.00 x 0.30 mm, with a tensile strength, R m of 1700 N/mm 2 .
- the carbon content of the steel is equal to 0.70 %.
- a primer 20 is applied on this wire.
- An alkyd/melamine resin is dissolved in a solvent such as benzene, xylene or in an alcohol.
- An anticorrosion pigment is added.
- the composition is about 30 % of the binding agent and about 70 % of the solvent.
- the primer is once diluted with acetone. After drying and curing a primer layer with a thickness between 0.8 and 2.5 ⁇ m is obtained.
- the strip comprises PVC as matrix material 22. This PVC material is applied by extrusion.
- the width of the strip equals to 6.00 mm, the thickness is 0.80 mm.
- Figure 3 shows another strip 16, comprising a rounded I-profile wire 18'.
- the wire has a tensile strength, R m of 1750 N/mm 2 and a carbon content of 0.80 %.
- the wire has a width of 4.00 mm.
- the center thickness is 0.30 mm and the thickness at the left and the right end equals 0.45 mm.
- This wire has the flexibility of a flat wire with a thickness of 0.30 mm and the resistance against the action of a pair of scissors of a flat wire with a thickness of 0.45 mm.
- a primer 20 is applied on this wire.
- the following composition of the primer is used : about 30 % fenol/epoxy resin, 8 to 10 % alcohol, 2.5 % diethanolamine in water.
- the thickness of the primer layer after drying and curing ranges between 1 and 4 ⁇ m.
- the strip comprises PVC as matrix material 22.
- the PVC is applied by fluidised bed coating.
- the strip 16 has at least on one side a flat surface.
- the width of the strip is 6.00 mm, the thickness is 0.90 mm.
- Figure 4 shows another embodiment of a strip 16 comprising four round steel wires 18" with a diameter of 0.40 mm. These wires are located parallel in the plane of the strip 16. Each wire is hereby in contact with his neighbor or neighbors.
- the tensile strength R m of the wire equals 2550 N/mm 2 ; the carbon content is 0.80 %.
- a primer layer is applied on the wires.
- the strip comprises PVC as matrix material 22.
- the strip has at least on one side a flat surface.
- the width of the strip is 5.00 mm, the thickness is 0.80 mm.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention relates to a fabric (10) for reinforcement of canvasses.
The fabric comprises a warp (12) and a weft (14). At least one of the
warp or the weft is formed by a strip comprising at least one elongated
metal member (18) and a thermoplastic material (22) as matrix.
A primer layer (20) is applied on the metal member before the
application of the thermoplastic material to obtain a good adhesion
between the thermoplastic material and the metal member.
Description
- The present invention relates to a fabric and to a strip for the reinforcement of canvasses having a plastic coating.
The invention also relates to the use of a fabric and a strip for the reinforcement of canvasses having a plastic coating. - Canvasses with a plastic coating are for example used to cover the loads on vehicles or containers, they are also used as tent material.
- Such canvasses must meet several requirements.
They must be sufficient strong to avoid tearing due to movement of the load and simultaneously they must be sufficient flexible so that the canvasses can be easily and quickly slid to one side to open them.
A further requirement is that they must give a good protection against vandalism and robbery. Therefore a high resistance against the action of a knife or against the action of a pair of scissors is required.
Since the weight of the canvass limits the amount of load that may be transported by the vehicle or container, the weight of the canvass must be as low as possible. - WO 98/55682 describes a fabric for the reinforcement of canvasses. This reinforcement consists of strips comprising a thermoplastic matrix and several parallel metal members.
This gives a good flexibility and a rather good resistance against the action of a knife or a cutter. The resistance against the action of a pair of scissors achieved by this embodiment is not always sufficient. - It is an object of the invention to provide a fabric for the reinforcement of canvasses having an improved resistance against the action of a knife or a cutter and against the action of a pair of scissors or a pair of shears.
It is a second object to provide a fabric with a good corrosion resistance.
It is a further object to provide a fabric with a low weight. - According to one aspect of the invention, there is provided a fabric for the reinforcement of canvasses, having a plastic coating.
- The fabric comprises a warp and a weft. At least one of the warp or the weft is formed by a strip comprising at least one elongated metal member and a matrix of a thermoplastic material. The thermoplastic material is adherable to the plastic coating of the canvas. A primer layer is applied on the metal member before the thermoplastic material is applied on said coated metal member to realise a good adhesion between the thermoplastic material and the metal member.
The strips have a cross-sectional thickness ranging from 0.5 mm to 3 mm and a cross-sectional width ranging from 3 mm to 25 mm, preferably the thickness is between 0.5 mm and 2 mm and the width is between 3 mm and 15 mm. - The strips forming the warp and the strips forming the weft form meshes with a maximum dimension ranging from 5 cm to 30 cm. The dimension of these meshes can be adapted to the kind of goods that has to be transported. In most cases a maximum dimension of about 7 cm to 15 cm is preferred.
- The strips forming the weft can be welded to the strips forming the warp or they can be fixed to each other by means of an adhesive.
- According to a second aspect of the invention, there is provided a strip for reinforcement of canvasses having a plastic coating.
The strip comprises at least one elongated metal member and a matrix of a thermoplastic material. The thermoplastic material is adherable to the plastic coating of the canvas. A primer layer is applied on the metal member. This primer layer is required to obtain a good adhesion of the thermoplastic material to the metal member. Such a primer layer is applied on the surface of the metal member before the application of the thermoplastic material.
When no primer layer is applied, the wire could be pulled out the strip without difficulties.
Further, without the application of such a primer layer, the PVC layer flows away during the welding of the strip on the canvass. In this case the metal member is not longer surrounded by the matrix material after the welding. This would result in a fabric which is susceptible of corrosion. - The application of a primer layer on the metal further allows it to reduce the thickness of the PVC layer. This is of great importance since the amount of PVC used, has a direct influence on the weight of the reinforced canvass. As described before, it is desirable that the weight of the canvass is as low as possible.
- The metal member must give the strip the required strength but must also enable the strip to remain sufficient flexible, preferably in all directions. The flexibility of the strip is strongly influenced by the type of metal member used to reinforce the strip.
- The metal member is preferably a flat wire. Flat wire is flexible in the direction perpendicular to the flat side of the wire.
Since the flexibility is determined by the thickness of the wire, the wire is preferably less than 0.40 mm, more preferably less than 0.35 mm, for instance less than 0.30 mm.
Since the resistance against the action of a pair of scissors is increased when the tensile strength is high, a tensile strength of at least 1500 N/mm2 is preferred, more preferably the tensile strength is greater than 1700 N/mm2.
To obtain the desired tensile strength a carbon content greater than 0.40 % is preferred.
By preference, the wire is rounded off so that the cross section has no sharp corners, which could result in a damage of the canvass during welding. - Another metal member that can be used is a wire with a rounded I-profile. An I-profiled wire is a wire with a cross section resembling an I-shape. The thickness of the left end and the thickness of the right end are greater than the center thickness of the wire.
This wire has the same flexibility as a flat wire with a thickness equal to the center thickness of the I-profiled wire. The resistance against the action of a pair of scissors of this I-profiled wire is improved in comparison with this flat wire. This resistance equals the resistance of a flat wire with a thickness equal to the thickness of the broader left and right end of the I-profiled wire while the weight of such an I-profiled wire is reduced compared with this flat wire. - In another embodiment the metal member comprises at least two metal members. These metal members are preferably located parallel in the plane of the strip. The metal members could be round steel wires, square wires, rectangular wires or another type of wires. Each metal member is hereby in contact with at least one other metal member, so that they form together a kind of a flat wire.
The plurality of the elongated metal members gives the strip a good flexibility. The resistance against the action of a knife or against the action of a pair of scissors is remained because of the arrangement of the metal members forming a flat wire. - To improve the corrosion resistance of the fabric, the metal member or the metal members can be coated with a metallic coating layer such as zinc or a zinc alloy comprising 2 to 10 % Al and 0.1 to 0.4 % of a rare earth element such as La and/or Ce.
- A thermoplastic material such as PVC (polyvinylchloride) is applied on the metal member. The application can be done by any conventional means. Preferred application methods are extrusion, fluidised bed coating or plastisol coating.
- The adhesion of the primer to the wire surface is improved when the surface of the wire is clean. Therefore it can be desirable to degrease the wire surface before applying the primer layer.
- The application of the primer layer may be done by any conventional means.
- A first group of primers that can be used are thermosetting materials. Therefore binding agents are dissolved in an organic solvent or are dispersed with a limited amount of a dispersing agent in water to form an emulsion or a suspension.
Suitable binding agents are based on acrylate, alkyd/melamine, epoxy or fenol/epoxy resins. Other binding agents giving a good adhesion to the metal and to the PVC compounds can also be used.
Additives such as anticorrosion pigments, wetting agents and/or stabilising agents can be added.
The primer composition is applied to the metal by immersing the wire into the solution, the emulsion or the suspension of the primer material; the primer composition can also be applied by spraying.
The thickness of the wet primer layer can be calibrated by passing the wire and the primer through the calibrated opening of a die. The thickness of the primer layer can also be calibrated by felt wiping or by air wiping in a controled air stream.
The thickness of the primer layer may be influenced by further diluting the primer composition.
In order to allow drying and curing the wire can be heated.
Since it is desirable that the weight of the canvass is as low as possible, the thickness of the primer layer must be low. The thickness of the dry primer layer is preferably less than 10 µm, more preferably less than 5 pm, for instance les than 1 µm.
Radiation curable resins such as ultra violet, electron beam or infra red curable resins are also suitable as primer. - A second group of primer layers that can be applied are hot melts, for example ethylene copolymers such as EVA (ethyl vinyl acetate), polyamides or polyesters. In order to obtain a sufficient thin layer, it is preferred to use hot melts with a viscosity at 200°C of less than 20 Pa.s, more preferably this viscosity is less than 15 Pa.s. This hot melt can be applied with a variety of different equipments. Very suitable is the melt pot. Also application by extrusion is possible under certain conditions. A method for the application by extrusion is described in the patent specification BE 1006346.
- Depending on the viscosity and the method of the application of the primer layer, primer layers with a thickness of less than 25 µm, for instance less than 5 µm are obtained.
- A third group are silane-compounds. These are bifunctional molecules : one functional group is responsible for the binding with the metal(oxides), the other functional group reacts with the polymer. More details about these silane compound can be found in the PCT application with the application number PCT/BE98/0015. Usually the silane compounds are diluted in alcohols, although they can be diluted in other solvents or in water as well. With this type of compounds very thin primer layers with a thickness of 20 nm or even less can be achieved.
- The adhesion between the thermoplastic material and the metal member can be evaluated by carrying out the following test. The PVC layer is removed in the longitudinal direction over about 5 cm by means of the sharp side of a knife. By means of the blunt side of the knife the PVC layer is slightly lifted. Finally, the synthetic coating is tried to be pulled off the metal member with the fingers.
The more difficult the PVC layer can be pulled off, the stronger the adhesion of the PVC to the metal member. - The test is carried out both on a wire on which a PVC layer is extruded directly and on a wire coated with a primer layer before the extrusion of the PVC layer.
The PVC coating, extruded directly on the metal member can be pulled off easily, while the removal of the PVC coating is much more difficult when a primer layer is applied on the metal member. - After the application of the primer layer on the metal member the thermoplastic material is applied on the metal member.
- The thermoplastic material must give a good adhesion to the canvass. Since canvasses are usually coated with PVC, the thermoplastic material is preferably a PVC compound, although other thermoplastic materials with a good adhesion to PVC can be used as well.
Canvasses can also be made of polypropylene, polyethylene or of polyester. In these cases one chooses a thermoplastic material which gives a good adhesion to this polymers. - The invention will now be described into more detail with reference to the accompanying drawings wherein
- FIGURE 1 shows a fabric according to the first aspect of the present invention.
- FIGURE 2, FIGURE 3 and FIGURE 4 show three strips according to the second aspect of the present invention.
- Figure 1 shows an embodiment of a fabric according to the first aspect of the invention.
Thisfabric 10 comprises strips forming thewarp 12 and strips forming theweft 14. Thestrips 12 and thestrips 14 are welded to each other.
The width W of the meshes is 7.5 cm, the height H of the meshes is 15 cm. - Figure 2 shows a
strip 16 according to the second aspect of the invention.b
The strip comprises a hard rolledflat steel wire 18 of the type 4.00 x 0.30 mm, with a tensile strength, Rm of 1700 N/mm2. The carbon content of the steel is equal to 0.70 %.
On this wire aprimer 20 is applied. An alkyd/melamine resin is dissolved in a solvent such as benzene, xylene or in an alcohol. An anticorrosion pigment is added. The composition is about 30 % of the binding agent and about 70 % of the solvent. The primer is once diluted with acetone. After drying and curing a primer layer with a thickness between 0.8 and 2.5 µm is obtained.
The strip comprises PVC asmatrix material 22. This PVC material is applied by extrusion.
The width of the strip equals to 6.00 mm, the thickness is 0.80 mm. - Figure 3 shows another
strip 16, comprising a rounded I-profile wire 18'. The wire has a tensile strength, Rm of 1750 N/mm2 and a carbon content of 0.80 %. The wire has a width of 4.00 mm. The center thickness is 0.30 mm and the thickness at the left and the right end equals 0.45 mm.
This wire has the flexibility of a flat wire with a thickness of 0.30 mm and the resistance against the action of a pair of scissors of a flat wire with a thickness of 0.45 mm.
Aprimer 20 is applied on this wire. The following composition of the primer is used : about 30 % fenol/epoxy resin, 8 to 10 % alcohol, 2.5 % diethanolamine in water. The thickness of the primer layer after drying and curing ranges between 1 and 4 µm.
The strip comprises PVC asmatrix material 22. The PVC is applied by fluidised bed coating. Thestrip 16 has at least on one side a flat surface.
The width of the strip is 6.00 mm, the thickness is 0.90 mm. - Figure 4 shows another embodiment of a
strip 16 comprising fourround steel wires 18" with a diameter of 0.40 mm.
These wires are located parallel in the plane of thestrip 16. Each wire is hereby in contact with his neighbor or neighbors.
The tensile strength Rm of the wire equals 2550 N/mm2; the carbon content is 0.80 %.
A primer layer is applied on the wires. The strip comprises PVC asmatrix material 22. The strip has at least on one side a flat surface.
The width of the strip is 5.00 mm, the thickness is 0.80 mm.
Claims (20)
- A fabric (10) for reinforcement of canvasses having a plastic coating, said fabric comprising a warp (12) and a weft (14), at least one of the warp or the weft being formed by a strip which comprises at least one elongated metal member (18) and a matrix of a thermoplastic material (22) adherable to the plastic coating of the canvasses, characterised in that said elongated metal member has been coated with a primer layer (20) before said thermoplastic material is applied on the coated metal member to realise an adhesion between said thermoplastic material and said elongated metal member.
- A fabric according to claim 1, whereby both the warp and the weft are formed by said strip.
- A strip (16) for reinforcement of canvasses having a plastic coating, said strip comprises at least one elongated metal member (18) and a matrix of a thermoplastic material (22) adherable to the plastic coating of the canvasses extruded on the metal member,
characterised in that said elongated metal member has been coated with a primer layer (20) before said thermoplastic material is extruded on the coated metal member to realise an adhesion between said thermoplastic material and said elongated metal member. - A strip according to claim 3, whereby said primer layer comprises a thermosetting material.
- A strip according to claim 4, whereby said thermosetting material is selected from the group consisting of acrylate based resins, epoxy based resins or alkyd based resins.
- A strip according to claim 3, whereby said primer layer comprises a hot melt.
- A strip according to claim 6, whereby said hot melt is selected from the group consisting of ethylene copolymers, polyamides or polyesters.
- A strip according to claim 3, whereby said primer layer comprises a bifunctional silane compound.
- A strip according to anyone of claims 3 to 8, whereby said thermoplastic material is polyvinylchloride.
- A strip according to anyone of claims 3 to 8, whereby said thermoplastic material is a polyvinylchloride compound.
- A strip according to anyone of claims 3 to 10, whereby said metal member is a flat wire with a tensile strength greater than 1500 N/mm2.
- A strip according to anyone of claims 3 to 10, whereby said metal member is a flat wire with a tensile strength greater than 1700 N/mm2.
- A strip according to anyone of claims 3 to 12, whereby said metal member is a flat wire with a thickness of less than 0.35 mm.
- A strip according to anyone of claims 3 to 10, whereby said metal member is a wire with a rounded I-profile.
- A strip according to anyone of claims 3 to 14, whereby said metal member is a steel wire with a carbon content of at least 0.40 %.
- A strip according to anyone of claims 3 to 10, whereby said metal member comprises at least two metal members.
- A strip according to claim 16, whereby the metal members are located parallel in the plane of the strip, each metal member being in contact with a least one other metal member.
- A strip according to anyone of claims 3 to 17, whereby said metal member is coated with a zinc layer or with a zinc alloy layer.
- Use of a fabric according to claims 1 or 2 for reinforcement of a canvass.
- Use of a strip according to anyone of claims 3 to 18 for reinforcement of a canvass.
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99200806A EP1041192A1 (en) | 1999-03-16 | 1999-03-16 | Canvasses reinforced with metal members |
JP2000605824A JP2002539342A (en) | 1999-03-16 | 2000-03-06 | Textures and strips |
PCT/EP2000/001900 WO2000055419A1 (en) | 1999-03-16 | 2000-03-06 | Canvasses reinforced with metal members |
AT00910779T ATE227368T1 (en) | 1999-03-16 | 2000-03-06 | COVERS THAT ARE REINFORCED WITH METAL ELEMENTS |
EP00910779A EP1161591B1 (en) | 1999-03-16 | 2000-03-06 | Canvasses reinforced with metal members |
BRPI0009020-4A BR0009020B1 (en) | 1999-03-16 | 2000-03-06 | strip for reinforcing plastic coated tarpaulins. |
DE60000730T DE60000730T2 (en) | 1999-03-16 | 2000-03-06 | PLANS REINFORCED WITH METAL ELEMENTS |
AU32866/00A AU3286600A (en) | 1999-03-16 | 2000-03-06 | Canvasses reinforced with metal members |
ES00910779T ES2186635T3 (en) | 1999-03-16 | 2000-03-06 | REINFORCED CANVAS WITH METAL ELEMENTS. |
CNB008041423A CN1145728C (en) | 1999-03-16 | 2000-03-06 | Canvasses reinforced with metal members |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99200806A EP1041192A1 (en) | 1999-03-16 | 1999-03-16 | Canvasses reinforced with metal members |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1041192A1 true EP1041192A1 (en) | 2000-10-04 |
Family
ID=8239992
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99200806A Withdrawn EP1041192A1 (en) | 1999-03-16 | 1999-03-16 | Canvasses reinforced with metal members |
EP00910779A Expired - Lifetime EP1161591B1 (en) | 1999-03-16 | 2000-03-06 | Canvasses reinforced with metal members |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00910779A Expired - Lifetime EP1161591B1 (en) | 1999-03-16 | 2000-03-06 | Canvasses reinforced with metal members |
Country Status (9)
Country | Link |
---|---|
EP (2) | EP1041192A1 (en) |
JP (1) | JP2002539342A (en) |
CN (1) | CN1145728C (en) |
AT (1) | ATE227368T1 (en) |
AU (1) | AU3286600A (en) |
BR (1) | BR0009020B1 (en) |
DE (1) | DE60000730T2 (en) |
ES (1) | ES2186635T3 (en) |
WO (1) | WO2000055419A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003077692A1 (en) * | 2002-03-15 | 2003-09-25 | Eric Hazan | Cut-resistant and cut-warning fabric |
WO2016001040A1 (en) * | 2014-06-30 | 2016-01-07 | Hexcel Holding Gmbh | Non-woven fabrics |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005028783A1 (en) * | 2003-09-19 | 2005-03-31 | Nv Bekaert Sa | An architectural fabric |
CN100458009C (en) * | 2007-04-03 | 2009-02-04 | 东华大学 | Multifunctional canvas for awning and manufacturing method thereof |
JP6900594B2 (en) * | 2016-07-12 | 2021-07-07 | 福井県 | Metal / resin fiber tape material woven fabric and its manufacturing method, and metal / resin fiber tape material woven fabric laminate material |
CN108950879A (en) * | 2018-08-21 | 2018-12-07 | 珠海水丝新材料有限公司 | A kind of production method of superabsorbent water longitude and latitude non-woven fabrics |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0441719A1 (en) * | 1990-02-06 | 1991-08-14 | Tissus Techniques De Trevoux | Tarpaulin or similar material having improved tear resistance |
GB2317363A (en) * | 1996-09-20 | 1998-03-25 | C M I | Forming a cut resistant material |
WO1998055682A1 (en) * | 1997-06-06 | 1998-12-10 | N.V. Bekaert S.A. | Canvass reinforcement |
-
1999
- 1999-03-16 EP EP99200806A patent/EP1041192A1/en not_active Withdrawn
-
2000
- 2000-03-06 WO PCT/EP2000/001900 patent/WO2000055419A1/en active IP Right Grant
- 2000-03-06 DE DE60000730T patent/DE60000730T2/en not_active Expired - Lifetime
- 2000-03-06 AU AU32866/00A patent/AU3286600A/en not_active Abandoned
- 2000-03-06 JP JP2000605824A patent/JP2002539342A/en active Pending
- 2000-03-06 BR BRPI0009020-4A patent/BR0009020B1/en not_active IP Right Cessation
- 2000-03-06 ES ES00910779T patent/ES2186635T3/en not_active Expired - Lifetime
- 2000-03-06 AT AT00910779T patent/ATE227368T1/en not_active IP Right Cessation
- 2000-03-06 CN CNB008041423A patent/CN1145728C/en not_active Expired - Fee Related
- 2000-03-06 EP EP00910779A patent/EP1161591B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0441719A1 (en) * | 1990-02-06 | 1991-08-14 | Tissus Techniques De Trevoux | Tarpaulin or similar material having improved tear resistance |
GB2317363A (en) * | 1996-09-20 | 1998-03-25 | C M I | Forming a cut resistant material |
WO1998055682A1 (en) * | 1997-06-06 | 1998-12-10 | N.V. Bekaert S.A. | Canvass reinforcement |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003077692A1 (en) * | 2002-03-15 | 2003-09-25 | Eric Hazan | Cut-resistant and cut-warning fabric |
WO2016001040A1 (en) * | 2014-06-30 | 2016-01-07 | Hexcel Holding Gmbh | Non-woven fabrics |
Also Published As
Publication number | Publication date |
---|---|
CN1145728C (en) | 2004-04-14 |
DE60000730T2 (en) | 2003-07-31 |
BR0009020B1 (en) | 2010-11-03 |
ES2186635T3 (en) | 2003-05-16 |
ATE227368T1 (en) | 2002-11-15 |
EP1161591B1 (en) | 2002-11-06 |
DE60000730D1 (en) | 2002-12-12 |
EP1161591A1 (en) | 2001-12-12 |
WO2000055419A1 (en) | 2000-09-21 |
AU3286600A (en) | 2000-10-04 |
JP2002539342A (en) | 2002-11-19 |
BR0009020A (en) | 2001-12-26 |
CN1341177A (en) | 2002-03-20 |
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