Classifications

• • 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
  • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
  • B29C70/06—Fibrous reinforcements only
  • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
  • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
  • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
  • B29C70/202—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres arranged in parallel planes or structures of fibres crossing at substantial angles, e.g. cross-moulding compound [XMC]
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
  • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
  • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
  • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2233/00—Use of polymers of unsaturated acids or derivatives thereof, as reinforcement
  • B29K2233/04—Polymers of esters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
  • B29K2309/08—Glass
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
  • Y10T442/184—Nonwoven scrim
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
  • Y10T442/184—Nonwoven scrim
  • Y10T442/198—Coated or impregnated
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2738—Coating or impregnation intended to function as an adhesive to solid surfaces subsequently associated therewith
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2926—Coated or impregnated inorganic fiber fabric
  • Y10T442/2992—Coated or impregnated glass fiber fabric

Definitions

• the present invention relates to the general technical field of textile grids formed of a network of warp and weft yarns, such grids acting in particular as reinforcements or supports in different industrial applications.
• the present invention relates to a textile grid formed by a network of crossed or superimposed nonwoven threads comprising at least one ply of warp threads and at least one ply of weft threads, the warp and weft threads being linked together by a binder, said textile grid being coated on at least one of its faces with a thermally reactivable adhesive for laminating the grid on an external element, for example in order to reinforce it.
• the present invention also relates to any finished or unfinished industrial product incorporating a textile grid according to the invention.
• the present invention also relates to a method of manufacturing a textile grid in which a network of crossed or superimposed nonwoven threads is produced, comprising at least one ply of warp threads and at least one ply of weft threads to form a grid. primitive, and in which at least one of the faces of said primitive grid is coated with thermally reactivatable adhesive.
• the present invention finally relates to a device for implementing at least part of the above-mentioned method.
• the known grids can, for example, use at least two layers of warp yarns which are superimposed or even offset, each pair of plies having interposed between them at least one ply of weft son.
• the warp threads and the weft threads are linked together at their crossings by a binder creating a series of bonding points, with a view to obtaining a textile grid having a finished structure and mechanically stable.
• the grids produced according to this technique generally give satisfaction and serve as reinforcements or supports in very varied technical fields such as, for example, without limitation, in the building industry as supports for parquet and ceramics, or coatings wall and carpet, in the paper industry, or even as reinforcing elements in synthetic or other foams.
• the grids intended to serve as reinforcements are assembled by bonding to the surface of the element to be reinforced. Such an assembly is also called laminating. This lamination can be done using an external supply of glue.
• the binder impregnating the grid is capable of ensuring this bonding function.
• the binders used to date are generally polymeric adhesives in aqueous phase or solvent crosslinked or not.
• the reactivation of such adhesives requires temperatures of the order of 150 ° C to 300 ° C.
• Such temperature levels therefore induce significant laminating times, since as a function of the time necessary for the heating device to reach the reactivation temperature, it being understood that the higher this temperature, the longer this temperature rise time will be.
• Such temperature levels also prohibit laminating on certain materials that would not support them.
• foams are in fact generally altered or destroyed at such temperature levels.
• the higher the reactivation temperature the greater the energy input required for this reactivation, requiring heavy equipment and therefore costly. This leads to an increase in the cost price of the reinforced products obtained, which constitutes an industrial disadvantage.
• the objects assigned to the present invention therefore aim to remedy the various drawbacks of the heat-activated textile grids of the prior art mentioned above, and to propose a new textile grid having improved properties and which is easy to use and at a reduced cost, said grid being formed by a network of crossed non-woven threads, and being coated with a thermally reactivable glue to laminate the grid to an external element.
• Another object of the invention is to propose a new textile grid coated with a thermally reactivable adhesive which is suitable for laminating on most materials.
• Another object of the invention is to propose a new textile grid coated with a thermally reactivable adhesive capable of improving the general mechanical and chemical resistance of the grid.
• Another object of the invention is to propose a new textile grid allowing a clean bonding without solvent.
• the objects assigned to the invention are achieved using a textile grid formed by a network of nonwoven cross-threads, comprising at least one layer of warp threads and at least one layer of weft threads, the threads of warp and weft being linked together by a binder, said textile grid being coated on at least one of its faces with a thermally reactivable glue to laminate the grid to an external element, characterized in that the viscosity of said glue, measured at a temperature of 230 ° C according to standard ASTM-D3236-88, is less than or equal to 40 Pa.s.
• a method of manufacturing a grid according to the invention characterized in that it comprises at least:
• a coating step where at least one of the faces of said primitive grid is coated with thermally reactivable adhesive, the viscosity of which is measured at a temperature of 230 ° C. according to the standard
• ASTM-D3236-88 is less than or equal to 40 Pa.s.
• a device for implementing the method according to the invention characterized in that it comprises: - a tank intended to contain thermally reactivable glue, the viscosity of which, measured at 230 ° C according to standard ASTM-D3236-88, is less than or equal to 40 Pa.s, said tank being heated so as to keep the glue in melting, and having at least one opening, - a cylinder rotating around its axis of symmetry, said cylinder being arranged and positionable relative to the tank so as to continuously feed, due to its rotation, glue in fusion through of said opening, and continuously depositing this molten glue on the face of a textile grid to be coated with glue, - a conveyor means for bringing said textile grid substantially into contact with the cylinder.
• FIG. 1 illustrates, in a side view in section, a detail of the structure of a textile grid according to the invention.
• FIG. 2 illustrates, in a top view, a detail of a grid according to the invention.
• FIG. 3 illustrates, in a schematic view in longitudinal section, the principle of embodiment and operation of a device for implementing the method according to the invention.
• FIG. 4 illustrates a detail of the device shown schematically in Figure 3 on an enlarged scale.
• the textile grid 5A is formed by a network of nonwoven crossed threads, comprising at least one ply of warp threads 1, 1 ', and at least one ply of weft threads 2.
• the wires thus delimit empty zones, so that the grid has an openwork structure.
• the textile grid according to the invention comprises at least two plies of warp threads 1, 1 ′ between which is interposed at least one ply of weft threads 2.
• the construction of the network of warp threads 1, 1 'and weft threads 2 is obtained by shifting the warp threads 1, 1' and weft 2 without superposition (see Figure 2), or on the contrary by ensuring a superposition of the wires.
• the network of warp 1 and weft 2 threads can be obtained by crossing the warp and weft threads at 90 ° (square construction), or according to a different angular inclination, for example bidirectional or tri- directional.
• the texture of the textile grid according to the invention may vary from 0.4 thread per centimeter to 10 threads per centimeter, for warp and weft threads.
• any type of textile thread commonly used to date in the production of textile grids may be used, and for example glass threads (having a linear mass can for example vary from 11 to 544 tex) or polyester (having a linear mass which can vary for example between 78 Dtex and 1100 Dtex).
• the warp 1, 1 ′ and weft 2 threads are linked together by a binder creating a series of bonding points at the intersections of the network of threads.
• any binder commonly used to date in the technical field considered may in particular be used, and in particular any polymer adhesive of the thermoplastic polymer binder type.
• the network of threads forming the textile grid in accordance with the invention can thus be made using synthetic latex (SBR), PVAC, PVC plastisols, polyvinyl alcohol (PVA), conventional iron-on impregnations, polyurethane binders or acrylic binders for example.
• SBR synthetic latex
• PVAC PVAC
• PVC plastisols PVAC
• PVAC polyvinyl alcohol
• PVVA polyvinyl alcohol
• conventional iron-on impregnations polyurethane binders or acrylic binders for example.
• the textile grid 5A is coated on at least one of its faces A with a thermally reactivable adhesive 3 to laminate the grid to an external element.
• a thermally reactivatable adhesive is a material which, when it is going to be subjected to a characteristic temperature known as thermal reactivation, will have an adhesive character allowing it to become integral with an external element. This solidarity is lasting, a times the material returned to a temperature below said thermal reactivation temperature.
• the reactivatable adhesive material can have a non-adhesive nature at room temperature and be in the solid state, while when it is heated to at least its thermal reactivation temperature, it takes the form of a liquid, which can be very viscous, with good adhesive power.
• the thermal reactivation is done using a heating means which can be of any known type, and for example using high frequency or infrared radiation, conduction or convection phenomena.
• the viscosity of the adhesive 3, measured at a temperature of 230 ° C according to standard ASTM-D3236-88, is less than or equal to 40 Pa.s.
• the viscosity of said adhesive measured at a temperature of 200 ° C according to standard ASTM-D3236-88, is less than or equal to 30 Pa.s.
• the viscosity of said adhesive measured at its application temperature (the value of which is systematically available from the manufacturer) according to standard ASTM-D3236-88, is less than or equal to 30 Pa.s.
• Such a viscosity characteristic is representative of an adhesive which can be reactivated at temperatures which may be relatively low, and which may drop, for example, up to 70 ° C.
• the textile grid 5A according to the invention can be laminated without damage to materials which do not withstand high temperatures, and in particular synthetic foams.
• the adhesive 3 is of the “hot-melt” type.
• a “hot-melt” type adhesive is a 100% hot-melt adhesive, also called 100% active adhesive, which comprises a thermoplastic material capable of passing from a non-adhesive solid state to an adhesive viscous state, and this in a reversible manner.
• the solid state is obtained when the material is subjected to a temperature below a characteristic temperature called the thermal reactivation temperature, which can vary for example between 70 ° C. and 180 ° C. depending on the formulation of the adhesive.
• the thermal reactivation temperature a characteristic temperature
• the thermal reactivation temperature can vary for example between 70 ° C. and 180 ° C. depending on the formulation of the adhesive.
• Hot-melt adhesives are well known as such. They consist of a mixture of polymers including:
• polymers or copolymers of high molecular weight for example polyethylene vinyl acetate, polyamide, polyester, epoxy, polyethylene, - waxes of the paraffin type of low molecular weight
• additives for example anti-UV or antioxidants.
• the grid according to the invention can be laminated to most materials, so as to form a complex.
• the grid according to the invention is thus also capable of being compatible with secondary or final transformations of the complex, such as for example thermoforming of the complex.
• the textile grid according to the invention can use any type of known “hot-melt” glue.
• the textile grid 5A according to the invention may be covered with thermally reactivable adhesive 3 on at least one of its faces according to a surface mass (or sizing weight) of for example between 2 and 300 g / m 2 .
• the ratio of the mass of glue 3 coating the network of wires to the mass of said network of wires may be between 50 and 400%, and preferably between 100 and 300%.
• an adhesive 3 of the “hot-melt” type thus makes it possible to produce large and uniform adhesive deposits, since the adhesive 3 consists entirely of adhesive material, and not of an adhesive-solvent mixture.
• the binder of the textile grid according to the invention is formed by said thermally reactivable adhesive 3, said adhesive thus ensuring a double function:
• the grid has a finite and mechanically stable structure (i.e. which stands by itself, independently of any interaction with an external element),
• the grids according to the invention have a mechanical resistance to rupture of between approximately 19 and 1970 Newtons over 5 cm.
• the coating of hot-melt type adhesive improves the tensile and tear strength of the grid. It also allows an improvement in the flexural modulus and the stiffness of the grid.
• the textile grid 5A in accordance with the invention can also be advantageously used as reinforcement for automobile wheelchair foam, since the reactivation temperature of the adhesive is compatible with the temperature that such foam can endure. This makes it possible to produce mechanically resistant armchairs while giving them a high-end connotation.
• the textile grid according to the invention can be used to replace the polyvinyl chloride reinforcements, usually used for example for car seats. Such use has the important advantage that, in the event of combustion (accidental or end of product life) of the seat, the grid does not release toxic products, while polyvinyl chloride releases chlorine.
• the textile grid according to the invention will also be particularly well suited for assembling floor coverings of the tiling, parquet type, or for reinforcing wiping cloths. It can also be used for the production of crack cover adhesives.
• the grid according to the invention thus makes it possible to be adapted to the conditions of use of the final product. It also allows recycling of reinforced products at the end of their life, since due to the reversible nature of the glue used (character which aqueous glues do not have), the grid can be separated at will from the element it reinforces.
• the process for manufacturing a textile grid according to the invention and as described above implements a series of production steps, at least of which:
• a step of crossing (not shown) the warp 1, 1 ′ and weft 2 threads to form a primitive grid 5;
• a production step is well known to those skilled in the art, and can for example be carried out by any suitable method
• a coating step (see FIGS. 3 and 4), where at least one of the faces A of said primitive grid 5 is coated with thermally reactivable adhesive 3 whose viscosity, measured at a temperature of 230 ° C. according to the ASTM standard- D3236-88, is less than or equal to 40 Pa.s, or more preferably is less than or equal to 30 Pa.s, when it is measured at 200 ° C according to the same standard.
• the coating step is carried out immediately after the crossing step.
• the grid 5 does not stand by itself, and the coating step makes it possible both to give the grid 5 a clean mechanical strength and to provide it with a thermally reactivable glue, for subsequent lamination.
• the thermally reactivable glue 3 therefore acts both as a binder and as a lamination glue.
• the warp 1, 1 ′ and weft 2 threads are simultaneously covered with glue 3.
• said adhesive 3 is of the “hot-melt” type.
• the face A of the primitive grid 5 is coated with glue 3 which can be reactivated thermally, by tangential passage against at least part of the lateral surface 7A of a rotary cylinder 7 coated with said glue 3 in fusion.
• a cylinder 7 allows an application "with the roller", which allows a deposit of substantially uniform and regular adhesive on the primitive grid 5, without bead.
• a cylinder 7 makes it possible to avoid the drawbacks of conventional technologies for coating “hot-melt” type products, such as machines with “lip nozzles”.
• Such machines if they can be successfully used for coating closed supports, such as paper or fabric panels over large widths, are however ineffective for coating open substrates over suitable widths, with a low inherent mechanical strength, such as a primitive grid, without causing beads of glue which make the product very difficult to use.
• a primary bonding step occurs between the step of crossing the wires and the coating step.
• the primitive grid 5 is impregnated with a binder, so as to bond the weft 2 and warp 1 yarns together.
• a method according to this variant implements, after the primary bonding step, a grid having its own mechanical strength imparted by the primary impregnation of binder; the coating step, in this case, is only intended to provide the grid with a layer of thermally reactivable adhesive.
• the primary bonding step can be carried out by any method of the prior art, which are well known to those skilled in the art.
• binder conventionally used for such an application can be used during this step, and in particular the binders formed by a polymer adhesive, or those mentioned above.
• the invention also relates to a device for implementing the method according to the invention.
• This device includes:
• a tank 6 intended to contain glue 3 which can be reactivated thermally, the viscosity of which, measured at 230 ° C. according to standard ASTM-D3236-88, is less than or equal to 40 Pa.s, and so preferential is less than or equal to 30 Pa.s at 200 ° C., said tank 6 being heated by any suitable means, so as to keep the glue 3 in fusion, and having at least one opening,
• a cylinder 7 rotating around its axis of symmetry X, said cylinder 7 being arranged and positionable relative to the tank 6, so as to continuously feed, due to its rotation, glue 3 molten through said opening , and continuously depositing this glue 3 in fusion on the face A of a textile grid 5 to be coated with glue, - a conveying means (not shown) for bringing said grid 5 substantially into contact with the cylinder 7.
• the cylinder 7 is also heated to a temperature for example between 70 and 300 ° C, and preferably between 100 ° C and 220 ° C.
• This heating can be achieved by any known means.
• the rotating cylinder 7 is arranged so that any zone of at least part of its lateral surface 7A is alternately in contact:
• the cylinder 7 is positioned between the opening and the face A of the grid to be coated with glue 3.
• the cylinder 7 is driven by a rotational movement (materialized by the arrow 9) around its axis of symmetry X, which gives its lateral surface 7A a certain linear speed.
• the conveying means which can be of any known type (for example a conveyor belt), gives the grid 5 to be coated with adhesive a longitudinal translational movement which takes place at a certain speed of movement.
• the longitudinal translational movement 8 takes place at a displacement speed which is substantially equal to the linear speed of the lateral surface 7A of the cylinder.
• the quantity of glue deposited on the warp threads is substantially equal to the quantity deposited on the weft threads.
• the difference in linear speed between the lateral surface 7A of the cylinder 7 and the primitive grid 5 to be coated makes it possible to obtain a thickness E1 of adhesive on the warp threads 1, 1 ′ which is different from the thickness E2 of adhesive on the weft yarn 2.
• the tank 6 is in turn made up of a body 6C provided with a doctor blade 6A for calibrating the coating of the cylinder, that is to say for controlling the thickness E of adhesive depositing on the lateral surface 7A of the rotary cylinder. 7.
• a second doctor blade 6B opposite the first makes it possible to close the tank 6 in cooperation with the first doctor blade 6A, during machine stops. It is of course conceivable to design a device using two cylinders to coat a primitive grid 5 of glue 3 on its two faces, simultaneously or not, without departing from the scope of the invention.
• the textile grids are thin enough that a coating on one side is sufficient to obtain a grid coated on both sides with glue.
• the device according to the invention thus makes it possible to coat, for example, grids whose width can vary between 0.2 and 5 m, at a speed of, for example, between 0.4 and 150 m per minute.
• the control of the linear speed differentials between the cylinder and the grid that is to say the control of the difference between the linear speed of the cylinder and the speed of movement of the grid, makes it possible to control the distribution of the adhesive deposit between the warp and weft threads, avoiding any unwanted bead.
• the invention finds its industrial application in the field of textile grids intervening in particular as reinforcements or supports.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Mechanical Engineering (AREA)
• Manufacturing Of Multi-Layer Textile Fabrics (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Nonwoven Fabrics (AREA)
• Laminated Bodies (AREA)
• Adhesive Tapes (AREA)

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Publications (1)

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Family Applications (1)

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• 2002
  • 2002-04-03 FR FR0204185A patent/FR2838141B1/fr not_active Expired - Fee Related
• 2003
  • 2003-04-03 CA CA 2481249 patent/CA2481249A1/en not_active Abandoned
  • 2003-04-03 WO PCT/FR2003/001047 patent/WO2003083198A1/fr not_active Application Discontinuation
  • 2003-04-03 US US10/509,582 patent/US20060035547A1/en not_active Abandoned
  • 2003-04-03 AU AU2003258849A patent/AU2003258849A1/en not_active Abandoned
  • 2003-04-03 JP JP2003580623A patent/JP2005527711A/ja not_active Withdrawn
  • 2003-04-03 EP EP03740560A patent/EP1499769A1/de not_active Withdrawn

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