EP4221531A1 - Procédé de production de matériau textile - Google Patents

Procédé de production de matériau textile

Info

Publication number
EP4221531A1
EP4221531A1 EP21783524.8A EP21783524A EP4221531A1 EP 4221531 A1 EP4221531 A1 EP 4221531A1 EP 21783524 A EP21783524 A EP 21783524A EP 4221531 A1 EP4221531 A1 EP 4221531A1
Authority
EP
European Patent Office
Prior art keywords
polymer composition
filament
temperature
nozzle
outlet opening
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.)
Pending
Application number
EP21783524.8A
Other languages
German (de)
English (en)
Inventor
Johannes VOELCHERT
Nils Arne ALTROGGE
Martin RÜEGG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
On Clouds GmbH
Original Assignee
On Clouds GmbH
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
Application filed by On Clouds GmbH filed Critical On Clouds GmbH
Publication of EP4221531A1 publication Critical patent/EP4221531A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/02—Footwear characterised by the material made of fibres or fabrics made therefrom
    • A43B1/04—Footwear characterised by the material made of fibres or fabrics made therefrom braided, knotted, knitted or crocheted
    • 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
    • D04H3/05—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 another pattern, e.g. zig-zag, sinusoidal
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0245—Uppers; Boot legs characterised by the constructive form
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/02—Footwear characterised by the material made of fibres or fabrics made therefrom
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0245—Uppers; Boot legs characterised by the constructive form
    • A43B23/025—Uppers; Boot legs characterised by the constructive form assembled by stitching
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/36—Feeding the material on to the mould, core or other substrate
    • B29C41/365—Construction of spray-up equipment, e.g. spray-up guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/126—Uppers
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/02—Footwear characterised by the material made of fibres or fabrics made therefrom
    • A43B1/028—Synthetic or artificial fibres
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0205—Uppers; Boot legs characterised by the material
    • A43B23/0215—Plastics or artificial leather
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D2200/00—Machines or methods characterised by special features
    • A43D2200/60—Computer aided manufacture of footwear, e.g. CAD or CAM

Definitions

  • the present invention relates to the field of shoe production, in particular the production of a textile material, in particular a shoe upper, and relates to a method for producing such a textile material and a textile material produced by means of this method.
  • Shoe uppers in particular are typically made of traditionally manufactured textile material. Traditionally, shoe uppers are knitted and then connected to a sole. The properties of the knitted textile material can be influenced by the targeted selection of the knitting technique or the plies.
  • solid shoe uppers such as those used in hard-shell shoes such as ski boots, ice skates, etc.
  • casting processes such as injection molding or via additive manufacturing or 3D printing.
  • 3D printed shoe uppers is that the shoe uppers can be individually adapted to the conditions of the runner's foot, in particular the contour of the foot.
  • the melt-blow process is also used to manufacture textile materials.
  • the melt-blow process only non-wovens such as fleece can be produced, the production of regularly formed, in particular mesh or loop-like, textile materials is not possible with the melt-blow process.
  • additive manufacturing of the textile material has the advantage that the textile can be designed differently in different areas without much effort.
  • a fiber that is produced using 3D printing can have a larger diameter in some areas than in others, e.g. to selectively reinforce certain areas.
  • traditional knitting it is not readily possible to use a yarn that has a larger diameter in exactly the desired areas of the textile than in other areas.
  • additive manufacturing makes it possible to reproduce different laying patterns and mesh sizes. For example, a portion of a textile can be knitted, while another portion is woven. This is practically impossible with traditional textile manufacturing processes.
  • traditional textile manufacturing processes normally produce significant amounts of offcuts, which is detrimental to the sustainability of such processes.
  • a method is provided which completely or partially overcomes the disadvantages of the methods known in the prior art.
  • a method is provided with which shoe uppers, in particular individually adapted to the foot of the runner, can be produced in a shorter time.
  • a method is provided which allows flexible production of a loop-like or mesh-like, preferably essentially continuous and oriented, textile material.
  • Mesh-like, or loop-like, textile material includes not only materials traditionally made by knitting and knitting, but also those materials made by additive manufacturing. This also includes, for example, windings of a filament which are arranged at least partially one above the other and which simulate a loop or mesh material.
  • the present invention relates to a method for producing a textile material, in particular an upper, comprising the steps of: providing a shaping support, in particular a last; melting a polymer composition at a first temperature; Applying the molten polymer composition to the shaping support.
  • the molten polymer composition is applied to the shaping carrier by means of a nozzle which has an outlet opening for the molten polymer composition and a plurality of air outlet openings arranged around the outlet opening, from which compressed air is applied to the exiting
  • Polymer composition is applied in such a way that the melted, exiting the nozzle polymer composition as a helical filament on the shaping carrier is applied.
  • the filament is present as a helical filament at least between the outlet opening and the carrier, or is present as a helical filament at least in a partial region between the outlet opening and the carrier.
  • a loop-like textile material which comprises the polymer composition, is formed on the shaping carrier.
  • a loop-like textile material can comprise a number of windings or loops that cross one another, but preferably do not wrap around one another. In comparison to a non-woven shoe upper, therefore, has one or more regularly arranged filaments.
  • the properties of the textile material produced can be varied and adjusted selectively and at any predeterminable point in time.
  • a very small radius leads to an area in the textile material with very tight loops or windings, and therefore to less elasticity and greater stability, as is required, for example, in areas with high mechanical stress.
  • Choosing a larger radius for the helical filament creates an area in the textile material with larger loops or turns, which results in greater elasticity in this area.
  • the helical filament can have a constant or variable radius in the direction of the shaping support.
  • the radius of the helix can increase, preferably continuously, from the outlet opening in the direction of the shaping carrier.
  • the shape of such a helix can be described, for example, by the envelope of a cone and thus the path of the filament from the outlet opening to the shaping support can be essentially conical.
  • the shape of the helix can be described by the envelope of a cone with an included angle of greater than 5°, in particular greater than 10°, in particular greater than 15°.
  • the opening angle of the cone can preferably be between 5° and 25°, in particular between 10° and 20°.
  • Another advantage of the invention is that the method allows within to produce a textile material, in particular a shoe upper, in a much shorter process time. For example, it is possible to produce a complete shoe upper in just 1.5 minutes. Due to the very short process time, among other things, the energy consumption per textile material produced, in particular per shoe upper, can be greatly reduced. In particular, only 0.035 to 0.06 kWh is required for a shoe upper.
  • a shoe upper refers to a shoe upper that is designed as a textile and is therefore designed to be softer and more flexible compared to a hard-shell shoe upper.
  • Such shoe uppers designed as a textile are known, for example, from sports shoes such as tennis shoes or running shoes.
  • a helical filament can typically have a helix with a minimum radius of 0.5 mm, preferably 1 mm, in particular 2 mm.
  • the radius of the helix can be, for example, 0.5 mm to 20 mm, in particular 1 mm to 10 mm.
  • the targeted selection of the radius of the helix of the helical filament directly influences the mesh size of the textile material.
  • the radius of the helix of the helical element can essentially correspond to the mesh size or the radius of the loops in the textile material. The smaller the radius of the helix, the tighter the mesh of the textile material.
  • the radius can be temporarily constant and/or varied during the application.
  • the radius of the helix of the helical element can also be adjusted when it comes into contact with the shaping carrier by changing the distance between the nozzle or the outlet opening and the shaping carrier.
  • the person skilled in the art also understands that the choice of the first temperature depends on the melting point or the melting range of the polymer composition and is typically selected in such a way that the polymer composition is melted and has sufficient viscosity to be applied to the shaping support by means of the nozzle.
  • the first temperature can also include a temperature range.
  • the first temperature can be, for example, 210 to 240°C, in particular 210 to 220°C.
  • the molten polymer composition is forced under pressure from the die through the exit orifice.
  • This pressure can be provided, for example, by an extruder or a pump, in particular by a gear pump.
  • a separate pump, in particular a gear pump is to be preferred here, as this allows better control of the pressure.
  • the polymer composition can be applied directly to the shaping support and/or also indirectly. Indirect application can occur when multiple layers of the helical filament or filaments are applied. In this case, under certain circumstances, only the filament applied first, or the first layer, is in direct contact with the shaping carrier.
  • the helical filament is applied at least temporarily or completely as a continuous filament.
  • the textile material produced comprises a number of continuous loops or windings, which consist of a single uninterrupted filament.
  • a textile material not fleece-like or non-woven.
  • the air outlet openings are typically distributed in a circle around the outlet opening of the nozzle.
  • the pleasure outlet openings have a horizontal angle ß between a horizontal plane, which is perpendicular to the outlet opening and the delivery direction, and an air outlet opening, or along an axis through an air outlet opening in the flow direction of the compressed air, between 40° and 60°, preferably between 50° and 60°, in particular 55°.
  • the air outlet openings are directed along an axis through the corresponding air outlet opening in the flow direction of the compressed air, not directly towards an axis extending through the center point of the outlet opening in the delivery direction, but in a horizontal direction, i.e. perpendicular to the delivery direction and the outlet opening, at an angle a delay.
  • the angle a can preferably be between 5° and 35°, in particular between 15° and 30°.
  • a ring nozzle from Robatech No. 185147 can be used.
  • the shaping support can be a last, for example. In a first step, this can be produced based on a 3D model of the wearer's foot. For this purpose, a foot of a wearer can be measured and a 3D model can be created based on this. The result of this is that an individual shoe upper adapted to the foot of the runner is produced. Furthermore, the shaping support can be the foot of the runner itself. The shoe upper is applied directly to the foot. Due to the sometimes high first temperature, the foot can be covered with a layer of heat-insulating material before the polymer composition is applied. This material can be detachable, dissolvable or removable so that it can be removed from the shoe upper in a final step without shoe upper itself is destroyed. In alternative embodiments, the shaping support can be a model of a backpack or bag. Furthermore, the shaping carrier can be a plate.
  • the shaping carrier which can in particular be a strip, has heating elements or can be heated.
  • This has the advantage that the textile material produced can be connected directly to another element in a material-to-material manner, in particular by welding.
  • the carrier can be heated at least in partial areas in such a way that an insole or a midsole can be welded directly to the shoe upper.
  • the shaping support in particular the strips, can have one or more indentations, in particular channels or furrows. It may be possible here to insert additional elements such as textile material, foam material, padding material, metal or plastic material into the depressions before the molten polymer composition is applied to the shaping carrier. When the molten polymer composition is applied, a material bond is formed between the polymer composition and the additional elements.
  • the shaping support can be a last, which has one or more indentations in the heel area. A damping material can be inserted into these depressions, which is arranged in such a way that the heel area of the shoe upper is dampened, or that a heel cushion (so-called “heel padding”) is formed.
  • the helical filament emerging from the outlet opening has a filament thickness of 0.01 mm to 0.2 mm, in particular 0.05 mm to 0.15 mm. This also corresponds to the filament strength of the filaments of the textile material produced.
  • the shaping carrier is moved relative to the nozzle.
  • the movement of the forming beam is controlled and controlled by a control unit.
  • the shaping carrier can be moved in three-dimensional space, for example by means of a positioning unit.
  • the positioning unit is controlled and controlled by the control unit.
  • the control unit can be part of a circuit, processor and/or computer.
  • the nozzle can be arranged so that it can move, in particular so that it can move in space.
  • the nozzle can be moved in three-dimensional space and in particular relative to the shaping carrier by means of a nozzle positioning unit.
  • the nozzle positioning unit is controlled and controlled by the control unit.
  • the control unit can be part of a circuit, processor and/or computer.
  • both the nozzle can be moved independently of one another in three-dimensional space by means of a nozzle positioning unit and the shaping carrier can be moved by means of a positioning unit.
  • the shaping support is moved relative to the nozzle at a speed of 1 m/min to 20 m/min, in particular 5 m/min to 15 m/min.
  • the compressed air is applied to the heated polymer composition in such a way that it emerges from the nozzle as a helical filament.
  • the helical shape of the filament emerging from the outlet opening can be controlled particularly precisely.
  • the helical shape can also be achieved in other ways, for example by controlled movement of the nozzle itself, this can lead to uncontrolled separation of the filament, so that regular, continuous loops cannot be formed from a filament.
  • the air outlet openings are preferably arranged at a predetermined oblique angle to the longitudinal axis and/or to the horizontal plane to the longitudinal axis of the outlet opening.
  • the nozzle can have a plurality of air outlet openings, in particular at least 5, preferably exactly 6 air outlet openings.
  • all air outlet openings are uniformly arranged at an angle or tilted to the longitudinal axis.
  • the compressed air is applied to the molten polymer composition continuously or intermittently.
  • the compressed air can be applied continuously at times, for example to form the helical filament, and discontinuously at times to separate the filament. This can be achieved, for example, by a sudden and brief increase in the pressure of the compressed air emerging from the air outlet openings. Another helical filament can then be applied continuously.
  • compressed air includes all suitable gases and gas mixtures. For cost reasons, however, the use of ambient air is preferable.
  • the compressed air is subjected to a pressure of 1.2 to 1.5 bar on the heated polymer composition.
  • the compressed air applied to the molten polymer composition has a temperature that is above room temperature (25° C.).
  • the compressed air can have a temperature that corresponds to the first temperature.
  • the temperature of the compressed air is preferably in a range from 200.degree. C. to 300.degree. C., in particular 240.degree. C. to 260.degree.
  • melting the polymer composition in step b. achieved by means of successively arranged temperature zones.
  • the polymer composition can pass through a first temperature zone, then a second temperature zone at a temperature above the temperature of the first temperature zone, and then optionally a third temperature zone at a temperature above the temperature of the first and second temperature zones .
  • the first temperature of the first temperature zone can range from 180 °C to 185 °C
  • the second temperature of the second temperature zone can range from 230 °C to 235 °C
  • optionally the third temperature of the third temperature zone can range from > 235 °C to 240 °C.
  • the polymer composition is applied to the shaping support as a continuous filament, resulting in a loop-like textile segment. Additionally or alternatively, the polymer composition can be partially applied as a discontinuous filament, resulting in a nonwoven-like textile segment. If the polymer composition is applied continuously and discontinuously to different areas of the shaping carrier, the textile material produced comprises both fleece-like, ie disordered, and loop-like and/or mesh-like, ie ordered segments. This is advantageous because disordered segments have different properties, particularly in terms of flexibility, durability, and surface finish.
  • a 3D model of a wearer's foot can be created. This can be achieved, for example, using a camera.
  • the creation of the 3D model can be fully or partially computer-implemented.
  • the 3D model can then be stored in a control unit. Based on the 3D model, the control unit can then determine a laying pattern according to which the molten polymer composition is applied to the shaping carrier. For example, it can be recognized that due to the individual shape of the wearer's foot, the shoe upper should be reinforced at certain points.
  • the control unit can then carry out the application in step c. control such that more layers of the polymer composition are applied at this point compared to other points, so that reinforcement is achieved here.
  • the polymer composition can have an adjustable second temperature during application, in particular when in contact with the shaping carrier.
  • This second temperature can be selected in such a way that the filament applied to the shaping carrier does not bond materially at crossing positions of filament segments, or it can be selected in such a way that the filament applied to the shaping carrier bonds materially at crossing positions of filament segments, in particular by merge.
  • Non-materially connected filament segments are typically freely and independently movable relative to one another. This achieves an advantageous flexibility in the manufacture of the textile material.
  • the loops of the polymer composition applied to the shaping carrier can be connected in a materially integral manner at any predetermined point in time in a predetermined area.
  • a smaller proportion of materially bonded crossover positions correspondingly increases the flexibility or stretchability of the corresponding area of the shoe upper, for example in areas of the shoe that are greatly stretched during walking due to anatomical movements.
  • the second temperature can be selected in such a way that it is a predefined amount below the melting temperature or the melting temperature range, so that there is no material connection of the filament segments. If a material connection is to take place, the second temperature is selected in such a way that it essentially corresponds at least to the melting temperature or the melting temperature range of the polymer composition, or is only a suitable amount below the melting temperature.
  • the second temperature can be adjusted by means of an air stream having a predetermined temperature applied to the polymer composition.
  • This air flow is typically different from the compressed air emerging from the air outlet openings.
  • the air stream can be provided from an air discharge device, which is arranged in the area between the outlet opening of the nozzle and the shaping support.
  • an air discharge device with air nozzles can be attached along the emergent helical filament, from which the air stream is discharged at a predetermined temperature in the direction of the helical filament.
  • the polymer composition can comprise or consist of a thermoplastic polymer, in particular polyamide, polyether block amide, polyurethane (thermoplastic polyurethane) and/or polyester.
  • a thermoplastic polymer in particular polyamide, polyether block amide, polyurethane (thermoplastic polyurethane) and/or polyester.
  • polyurethane thermoplastic polyurethane
  • polyester polyester
  • low molecular weight polyurethane or high molecular weight polyurethane can be used are, with generally high molecular weight polyurethane strength, especially the
  • thermoplastic materials so that he can select the first and optionally the second temperature accordingly.
  • the distance between the outlet opening and the shaping carrier is between 20 mm and 110 mm, in particular between 40 mm and 60 mm. The distance can be varied within these ranges during the application or kept constant during the entire application.
  • the textile material is a shoe upper and the produced shoe upper is connected to a sole to form a shoe, in particular a running shoe.
  • the shoe upper can be connected to a sole directly during application.
  • the sole can already be detachably connected to the shaping support. After the shoe upper has been produced, the shaping carrier can then be removed, so that a shoe, in particular a running shoe, is produced.
  • the method for producing a textile material, in particular the shoe upper is carried out by means of a dispensing device which has a pump, in particular a gear pump, a pump drive, a dosing head and the nozzle disclosed here with the outlet opening and the air outlet openings arranged around the outlet opening, and a Melting device includes.
  • the dispensing device can also have an air dispensing device, from which an air stream with a predetermined temperature can be applied to the filament exiting helically from the outlet opening of the nozzle to set the second temperature.
  • the air discharge device can preferably have air nozzles.
  • the melting device can have several, in particular three, temperature zones arranged one after the other. Every Temperature zone can have a separately controllable heating element.
  • the polymer composition can have a first temperature zone before exiting the nozzle, then a second temperature zone with a temperature that is above the temperature of the first temperature zone and then optionally a third temperature zone with a temperature that is above the temperature of the first and second temperature zones, run through.
  • the first temperature of the first temperature zone can be in a range of 180 °C to 185 °C
  • the second temperature of the second temperature zone in a range of 230 °C to 235 °C
  • optionally the third temperature of the third temperature zone in a range of > 235 °C to 240 °C.
  • the melting device may include an extruder having a barrel and a screw disposed therein.
  • the melting device can have heating elements for setting the first temperature. If an extruder is used, the extruder typically does not determine the pressure at which the polymer composition emerges from the orifice.
  • the pressure at which the polymer composition emerges from the outlet opening is typically provided and controlled by the pump, in particular a gear pump, since this allows the pressure to be set and controlled much more precisely.
  • the pressure exerted by the pump can in particular be between 40 and 60 bar.
  • a further aspect of the invention relates to a garment, in particular a shoe, comprising a textile material, in particular a shoe upper, produced by a method according to one of the embodiments disclosed here.
  • a garment in particular a shoe upper, has a loop-like textile material.
  • This can have a plurality of essentially regular turns.
  • a plurality of windings or loops preferably consist of a single filament. Filament segments can cross each other at crossing positions.
  • the filament segments can be cohesively bonded to one another at the crossing positions connected and / or not integrally connected to each other.
  • the loop-like textile material preferably comprises at least one crossing position at which filament segments, in particular filament segments of the same filament, are connected in a materially bonded manner.
  • the windings or loops are preferably of essentially circular or elliptical design.
  • a shoe upper that was produced according to a method of one of the embodiments disclosed here typically does not form a continuous surface, but is mesh-like, ie has a certain porosity.
  • the dispensing device includes a dosing head which is in fluid communication with a melting device and with a separate dosing pump.
  • the melting device comprises an extruder, which typically has a drum and a screw arranged therein.
  • the dispensing device also has a separate dosing pump which is fluidically connected to the dosing head.
  • the dosing head has a nozzle, which comprises an outlet opening which is in fluid communication with the dosing head, and a plurality of air outlet openings arranged around the outlet opening.
  • the air outlet openings are arranged in such a way that compressed air can be applied to a molten polymer composition emerging from the outlet opening in such a way that the molten polymer composition emerging from the nozzle is applied as a helical filament to a shaping carrier.
  • the extruder has the advantage that the polymer composition is freshly melted directly in the required amount and is not constantly kept in the molten state in a melting device, such as a heatable tank or the like. If the polymer composition is kept in the molten state for a long period of time, the polymer degrades significantly as it partially degenerates. When manufacturing a textile material, the quality, especially the filament stability, is of great importance.
  • the combination of the dosing head with an extruder only allows the currently required Amount of the polymer composition to melt, so that a degeneration of the
  • the melting device can have several, in particular three, temperature zones arranged one after the other. Each temperature zone can have a separately controllable heating element.
  • the polymer composition before exiting the die a first temperature zone, then a second temperature zone with a temperature that is above the temperature of the first temperature zone and then optionally a third temperature zone with a temperature that is above the temperature of the first and the second temperature zone, run through.
  • the first temperature of the first temperature zone can be in a range of 180 °C to 185 °C
  • the second temperature of the second temperature zone in a range of 230 °C to 235 °C
  • optionally the third temperature of the third temperature zone in a range of > 235 °C to 240 °C.
  • the dosing pump is a separate pump from the extruder.
  • the polymer composition could be dispensed from the outlet opening onto a shaping carrier solely with the aid of the extruder, it is important for the production of a textile material, which is mesh-like and comprises a single filament over several meshes or turns, that the dispensing pressure can be precisely controlled, which is not possible to a sufficient extent with an extruder.
  • the separate pump is therefore used to fine tune the pressure at which the molten polymer composition is dispensed.
  • the metering pump is preferably a gear pump.
  • the dispensing device can also have a motor for driving the metering pump.
  • the nozzle has at least 2, at least 3, at least 4, at least 5, at least 6, in particular 6, air outlet openings.
  • the Air outlet openings can be concentric and preferably in a uniform manner
  • the air outlet openings are not directed directly in the direction of the outlet opening of the nozzle.
  • the air outlet openings are directed along an axis through the corresponding air outlet opening in the flow direction of the compressed air, not directly towards an axis extending through the center point of the outlet opening in the discharge direction, but in a horizontal direction, i.e. perpendicular to the discharge direction and the outlet opening, around one Angle a shifted.
  • the angle a can preferably be between 5° and 35°, in particular between 15° and 30°. In this way it can be achieved, among other things, that the filament can be applied helically to a shaping carrier.
  • the air outlet openings can generally be linear channels, for example.
  • a horizontal angle ⁇ between a horizontal plane, which is perpendicular to the outlet opening and the delivery direction, and an air outlet opening, or along an axis through an air outlet opening in the flow direction of the compressed air is between 40° and 60°, preferably between 50° and 60 °, especially 55°.
  • the dispensing device also comprises an air dispensing device, which is designed to apply an air flow at a predetermined temperature to the second temperature of the polymer composition discharged onto the filament discharged helically from the outlet opening of the nozzle.
  • FIG. 1 shows a dispensing device 1 for carrying out the method according to the invention.
  • the dispensing device 1 comprises, as a melting device, an extruder with a barrel 2 with an entry opening, and a screw 3, in which the polymer composition is melted.
  • An adapter 8 connects to the extruder.
  • the dispensing device further comprises a metering pump 5 with a motor 4 and a metering head 6 and nozzle 7 with an outlet opening and air outlet openings arranged around the outlet opening, from which a helical filament is applied to the shaping carrier 9 .
  • the dispensing device also includes an air dispensing device 10, from which an air flow at a predetermined temperature can be applied to the filament exiting helically from the outlet opening of the nozzle in order to set the second temperature.
  • FIG. 2 shows a regularly formed textile material which is produced by means of the method according to the invention and which can form part of a shoe upper. Due to the filament emerging from the outlet opening in a helical shape, the textile material comprises regular filament segments which cross over at crossing positions and which form circular windings. Depending on the setting of the second temperature, the filament segments can either be bonded or not bonded at the crossing positions.
  • the textile material can be produced during manufacture along the dashed arrow.
  • FIG. 3 shows a schematic top view of a nozzle 7 as used in a dispensing device in the method according to the invention.
  • the air outlet openings are not aimed directly at the outlet opening of the nozzle.
  • the nozzle 7 has six such air outlet openings 71 (only one of the air outlet openings is labeled for a better overview). These are along axis 74 through the corresponding air outlet opening in the flow direction of the compressed air, not directed directly at an axis 73 extending through the center point of the outlet opening in the discharge direction, but shifted by an angle ⁇ in the horizontal direction, ie perpendicular to the discharge direction and the outlet opening.
  • the angle a along the 5 air outlet openings, i.e. along an axis 74 through the corresponding air outlet opening in the direction of flow of the compressed air to an axis 73, which is aimed directly at the outlet opening 72, can be between 5° and 35°, in particular between 15° and 30 ° amount.
  • FIG. 4 shows a schematic side view of the nozzle 7 as it is used in a dispensing device in the method according to the invention.
  • the horizontal angle ß between horizontal plane 76, which is perpendicular to the exit direction, and the air outlet opening (for better clarity, the direction of air outlet opening 71 is shown by axis 75) is between 40° and 60°, preferably between 50° and 60°, in particular 55° . 5

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Artificial Filaments (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

La présente invention concerne un procédé de production d'un matériau textile, en particulier d'une tige de chaussure, comprenant les étapes consistant à : prévoir un support de mise en forme, en particulier une forme ; faire fondre une composition de polymère à une première température ; appliquer la composition de polymère fondu au support de mise en forme. La composition de polymère fondu est appliquée sur le support de mise en forme au moyen d'une buse qui comporte une ouverture de sortie pour la composition de polymère fondu et une pluralité d'ouvertures de sortie d'air qui sont disposées autour de l'ouverture de sortie et à partir de laquelle de l'air comprimé est fourni à la composition de polymère sortant de telle sorte que la composition de polymère fondu qui est sortie de la buse est appliquée sous la forme d'un filament hélicoïdal au support de mise en forme.
EP21783524.8A 2020-09-30 2021-09-29 Procédé de production de matériau textile Pending EP4221531A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01239/20A CH717906A2 (de) 2020-09-30 2020-09-30 Verfahren zur Herstellung eines Textilmaterials.
PCT/EP2021/076857 WO2022069583A1 (fr) 2020-09-30 2021-09-29 Procédé de production de matériau textile

Publications (1)

Publication Number Publication Date
EP4221531A1 true EP4221531A1 (fr) 2023-08-09

Family

ID=78032445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21783524.8A Pending EP4221531A1 (fr) 2020-09-30 2021-09-29 Procédé de production de matériau textile

Country Status (5)

Country Link
US (1) US20240049837A1 (fr)
EP (1) EP4221531A1 (fr)
CN (1) CN116322416A (fr)
CH (1) CH717906A2 (fr)
WO (1) WO2022069583A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7926204B2 (en) * 2007-10-11 2011-04-19 Nike, Inc. Article of footwear with tubular sole assembly and method of manufacture
US9005710B2 (en) * 2012-07-19 2015-04-14 Nike, Inc. Footwear assembly method with 3D printing
US10945488B2 (en) * 2013-08-09 2021-03-16 Reebok International Limited Article of footwear with extruded components
US10471671B2 (en) * 2015-11-09 2019-11-12 Nike, Inc. Three-dimensional printing along a curved surface

Also Published As

Publication number Publication date
US20240049837A1 (en) 2024-02-15
CN116322416A (zh) 2023-06-23
CH717906A2 (de) 2022-03-31
WO2022069583A1 (fr) 2022-04-07

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