EP1660715A1 - Method for coating grey goods for carpeting using a broad slotted nozzle - Google Patents

Method for coating grey goods for carpeting using a broad slotted nozzle

Info

Publication number
EP1660715A1
EP1660715A1 EP04764873A EP04764873A EP1660715A1 EP 1660715 A1 EP1660715 A1 EP 1660715A1 EP 04764873 A EP04764873 A EP 04764873A EP 04764873 A EP04764873 A EP 04764873A EP 1660715 A1 EP1660715 A1 EP 1660715A1
Authority
EP
European Patent Office
Prior art keywords
carpet
thermoplastic
underside
filaments
upper layer
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.)
Withdrawn
Application number
EP04764873A
Other languages
German (de)
French (fr)
Inventor
Jürgen Steckelberg
Gerd Ostermann
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.)
Nordson Corp
Original Assignee
Nordson Corp
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 Nordson Corp filed Critical Nordson Corp
Publication of EP1660715A1 publication Critical patent/EP1660715A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • D06N7/0063—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf
    • D06N7/0071—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing
    • D06N7/0076—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing the back coating or pre-coat being a thermoplastic material applied by, e.g. extrusion coating, powder coating or laminating a thermoplastic film
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • 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
    • D06N2207/00—Treatments by energy or chemical effects
    • D06N2207/12—Treatments by energy or chemical effects by wave energy or particle radiation
    • D06N2207/123—Treatments by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation, e.g. IR, UV, actinic light, laser, X-ray, gamma-ray, microwave, radio frequency

Definitions

  • the invention relates to a method for coating a carpet raw material which has an upper layer with filaments.
  • the invention also relates to a carpet itself, which has an upper layer with filaments and a coating device for coating carpet raw materials.
  • Carpets and processes for their manufacture are well known.
  • Carpets usually have an upper layer, which can be designed differently.
  • the upper layer can consist of pressed filaments, which are also referred to as scrims or tangles.
  • the filaments are chopped against each other.
  • Such carpets are known as felts.
  • the top layer consists of yarns that are pulled through a layer of carrier material.
  • the yarns are filament bundles.
  • the yarns can be drawn through the carrier material as closed loops in a tufting process. By the Tufting processes are so-called tufted carpets.
  • the loops can also be cut open, and the cut loops then form velor.
  • Treated felts are sometimes also referred to as velours.
  • the top layers are exposed to high abrasion and treading loads; good filament binding prevents the individual filaments from becoming detached due to the subsequent loads.
  • test methods such as the Lisson test, for measuring the durability of a carpet.
  • Latex does not meet the requirements for recyclability. Processes for applying latex are energy-intensive and the associated production lines take up a lot of space. Try other forms of integration, e.g. using thermoplastics has so far failed due to the quality of the filament binding. The integration did not meet the requirements of standardized pedal, pull and abrasion loads.
  • the object of the invention is to provide a durable carpet without the latex incorporation of the filaments.
  • the object of the invention is to provide a coating device for coating carpet raw materials, which makes it possible to produce resilient carpets without binding the filaments with latex.
  • the object is achieved by a method for coating a carpet according to claim 1, in that a thermoplastic is applied to the underside of the carpet on the top layer and the filaments are glued.
  • the method according to the invention makes it possible to firmly bind the filaments of an upper layer of a raw carpet material into the carpet. It has been shown that the filaments can be adequately integrated by applying thermoplastic. A thermoplastic is applied to the underside of the top layer. The thermoplastic then glues the filaments in the carpet raw material. Compared to latex, thermoplastics and therefore the entire carpet are easier to recycle. For the application of the thermoplastic, a particular shape of a slot nozzle is preferably selected, which is described further below.
  • Thermoplastic is generally understood to mean a thermoplastic-based adhesive or a thermoplastic-based formulation.
  • thermoplastic can be used with various types of carpets, in particular with tufted carpets, which can be designed as loop or velor but also with felts, which can also be designed as loop or velor or as fleece or needle felt.
  • Tufted carpets have yarns or filament bundles that are guided through a carrier material, so that filament bundle sections protrude above and below the carrier material.
  • the filament bundle sections are preferably looped through the substrate material on the underside of the carpet.
  • Carpet loops are formed in that a filament bundle is passed through the backing material to the underside of the carpet, is deflected by a loop and is in turn guided from the underside of the carpet at a spaced (piercing) point through the backing material to the top of the carpet.
  • the Filament bundle sections on the underside of the carpet are not fixed and are therefore very sensitive because, on the one hand, they are only loosely pulled through the backing material and, on the other hand, individual filaments can easily be torn out of them.
  • the entire filament bundle is permanently glued to the backing material by the thermoplastic penetrating into spaces and thus making the carpet durable.
  • the thermoplastic also at least partially penetrates the filament bundle, so that the filaments are glued together. Penetrates the thermoplastic in the region of the outer periphery of the filament bundles one, so they have through the partially penetrating into them adhesive effectively a glued protective cover, which makes the carpet additionally Stable "The coated thermoplastic Filamentbündelabête form carpet underside thus called nubs.
  • filament bundles form loops on the underside of tufted carpets
  • their upper side can be designed differently, for example they can also have loops cut open.
  • all types of tufted carpets are suitable for the coating according to the invention.
  • filaments for forming the upper layer are connected to one another by mechanical methods such as pressing, needling or milling or by thermal methods.
  • the filaments form a tangle or scrim.
  • felts On the underside of the carpet, felts have an unordered structure.
  • the thermoplastic is applied on the underside of the carpet to the pressed top layer. Because even with felts it has surprisingly been shown that filament binding can be carried out in a simple manner by applying thermoplastic.
  • a carrier layer can also be arranged between the pressed filaments and the thermoplastic layer in the case of felts.
  • the top layer is preferably heated on the underside of the carpet and a thermoplastic on the underside of the carpet is applied to the heated top layer.
  • the heating of the carpet raw material before the application of the thermoplastic is preferably carried out using hot-melt adhesives.
  • Hot melt adhesives are solid at ambient temperature and liquid at elevated temperatures.
  • the hot-melt adhesive cools more slowly in preheated carpet raw materials and can therefore penetrate into the filament bundle sections over a longer period of time and filaments stick not only to the outer circumference but also to the inside of the filament bundles. With felts, the thermoplastic can penetrate deeper into the scrim or tangle.
  • the thermoplastic is heated after being applied to the underside of the top layer.
  • reheating can be combined with preheating.
  • the double heating enables the thermoplastic, in particular hot-melt adhesive, to penetrate particularly deeply into the filament bundle or the scrim.
  • a control can also be provided which controls the intensity of the preheating and post-heating and thus the depth of penetration of the thermoplastic into the filaments.
  • Infrared light IR light
  • thermoplastic is preferably applied on the underside of the carpet to the upper layer in a contact process.
  • a slot nozzle or wide slot nozzle can be used for this.
  • the carpet is transported past an inlet edge of an outlet slot of the slot nozzle. Filaments bend against the transport direction. After passing the inlet edge, you can straighten up again along the width of a pocket-like widening of an outlet slot of the slot nozzle for receiving the thermoplastic.
  • the pocket on the outlet slot enables a longer contact between the carpet raw material and the still flowing adhesive to be applied and thus a better filament binding.
  • a so-called carpet backing is laminated on the underside of the applied thermoplastic.
  • the carpet backing can be a fleece or a mesh material.
  • To laminate the back of the carpet it is sufficient to apply a sufficiently thick thermoplastic layer on the underside to the top layer and then immediately laminate the back of the carpet.
  • the thermoplastic glues the back of the carpet to the underside. It is therefore not necessary to apply another coating (second spread) for the backing. An additional production step can thus be saved. A corresponding further coating device can be dispensed with.
  • a carpet with the features of claim 12 which has an upper layer with filaments and a thermoplastic applied to the underside of the carpet, which glues the filaments in the carpet.
  • the carpet according to the invention can be produced by at least one of the methods mentioned above.
  • the thermoplastic penetrating into the knobs and / or filaments of the top layer on the bottom of the carpet gives the carpet a sufficient strength and durability which is sufficient for stress tests.
  • Both felts and tufted carpets can have a carrier material on which the filaments are placed or introduced.
  • the thermoplastic additionally glues the filaments to the carrier material.
  • the structure and type of material of the carrier material can be selected differently.
  • the carrier material can have a weave structure that consists of a plurality of oriented in two different directions There are plastic threads, plastic threads in one direction being alternately guided above and below the plastic threads in the other direction and thus woven.
  • the plastic threads can also be yarns.
  • the weave pattern has holes. In this preferred embodiment of the carpet, the filament bundles are passed through the holes in the weave pattern. This enables inexpensive and simple introduction of the filaments into the carpet, which are preferably glued to the weaving structure using hot-melt adhesive.
  • the carrier material can be a closed fleece, for example a bung-bond fleece.
  • the carrier materials can be varied.
  • the object is achieved by a coating device according to the invention for coating carpets with an upper layer with filaments, the coating device.
  • Transport elements for transporting the carpet along the coating device and a thermoplastic applicator for applying a thermoplastic to an underside of the upper layer of the carpet transported past the thermoplastic applicator.
  • the coating device can be used to use at least one of the methods described above and to coat at least one of the carpet raw materials described above.
  • the coated carpet raw materials preferably have a width of less than one to a few meters and any length.
  • the coating device is particularly suitable for coating long carpet webs, which are sold as rolls.
  • thermoplastic applicator is preferably arranged such that the thermoplastic flows beneath the thermoplastic applicator, preferably out of a slot nozzle, and is applied to the carpet arranged below the thermoplastic applicator.
  • thermoplastic applicator there are no additional means for transferring the adhesive from the slot nozzle on the carpet necessary.
  • the carpet transported under the thermoplastic applicator can be transported and supported by a coating roller.
  • An adhesive in particular a hot-melt adhesive, is preferably applied to the carpet.
  • a first heating element is arranged in front of the thermoplastic applicator and / or a second heating element is arranged after the thermoplastic applicator in the transport direction.
  • the two heating elements which are preferably IR radiators, serve, as described above, to preheat and reheat the carpet passed under the adhesive applicator in order to improve and support penetration of the hot-melt adhesive into the underside of the " top layer.
  • the thermoplastic applicator has a slot nozzle for applying the thermoplastic, in particular adhesive, preferably hot melt adhesive.
  • the slot nozzle can have an outlet slot for the thermoplastic and, in the transport direction, an inclined inlet edge in front of the outlet slot and at least one pocket behind the outlet slot.
  • the leading edge which is slanted towards the carpet in the direction of transport, enables the carpet to be transported evenly under the slot nozzle without the carpet getting caught.
  • the pocket arranged behind the outlet opening receives thermoplastic and also serves to form a longer contact surface between the thermoplastic and the carpet being transported past.
  • the bag allows the knobs and filaments to straighten up and relax, or to open again after passing the leading edge. This special shape of the slot nozzle ensures particularly tight integration of the filaments.
  • FIG. 1 shows a schematic cross section of a preferred embodiment of a tufted carpet
  • FIG. 2 shows a schematic representation of a preferred embodiment of a coating device
  • FIG. 3 shows a cross section through a preferred embodiment of a slot nozzle
  • FIG. 4 shows a cross section through a preferred embodiment of a felt carpet.
  • the carpet 1 according to the invention which is shown in FIG. 1, is a tufted carpet. It has a flat carrier material 2, from which filament bundle sections 3 protrude on the underside of the carpet. Further filament bundle sections 4 protrude from the carrier material 2 on the top of the carpet. The filament bundle sections 4 on the upper side of the carpet and the carrier material 2 form an upper layer 21 of the tufted carpet. Adjacent filament bundle sections 3 on the underside of the carpet are connected to carpet loops 5 on the underside of the carpet. Adjacent filament bundle sections 4 on the carpet are connected to carpet loops 6 on the carpet. 1 shows a single filament bundle 7, which forms sections of the underside 3 of the carpet and filament bundle sections 4 on the top of the carpet. The filament bundle 7 is drawn alternately along its length from top to bottom and vice versa through the backing material 2 and thereby forms the staggered carpet underside 5 and carpet top 6 carpet loops along its length.
  • a hot-melt adhesive 8 is applied to the filament bundle sections 3 protruding from the underside of the carpet and to the underside of the carrier material 2.
  • the hot melt adhesive 8 partially or completely penetrates the filament bundle sections 3 on the underside of the carpet and forms knobs.
  • the hot-melt adhesive 8 sticks the filament bundle sections 3 on the underside of the carpet to the carrier material 2 and, on the other hand, it fixes the filament bundle sections 3 on the underside of the carpet.
  • the carrier material 2 has a woven or braided structure (not shown). Plastic yarns are arranged parallel to each other in two directions perpendicular to each other. The plastic threads in one direction are alternately guided above and below the plastic threads in the other direction. On the underside of the carpet, after the nubs and filaments have been bound, a carpet back can be laminated onto the adhesive layer.
  • the filament bundles 7 are guided approximately vertically through the carrier material 2 at piercing points 9.
  • the piercing points 8 are formed by the holes formed in the braiding structure and the filament bundles 7 are guided through these holes.
  • the carpet loops 3 on the underside of the carpet form a space between them and the carrier material 2 which is completely filled with hot-melt adhesive 8.
  • FIG. 2 schematically shows a coating device for coating a carpet 1 according to FIG. 1.
  • the coating device has an adhesive applicator 10 which is intended for applying the hot-melt adhesive to an underside of the carpet 1.
  • the adhesive applicator 10 has at its carpet-side end, which is the lower end in FIG. 2, a slot nozzle 11, through which hot-melt adhesive is applied flatly to the carpet 1 underneath the carpet web that passes under the adhesive applicator 10.
  • the carpet 1 passing under the adhesive applicator 10 is supported by a coating roller 12 which is arranged below the adhesive applicator 10 and opposite it.
  • a small space is formed between the adhesive applicator 10 and the coating roller 12 through which the carpet 1 is transported.
  • the distance between the coating roller 12 and the adhesive applicator 10 is adjustable by the height of the adhesive applicator 10.
  • the height adjustability of the adhesive applicator 10 is indicated by the arrow on both sides.
  • the order with the adhesive applicator 10 is a contact order.
  • the direction of transport of the carpet 1 is indicated by the two arrows on one side. In the transport direction of the carpet 1 in front of the adhesive applicator 10, the underside of the carpet is uncoated and in the transport direction behind the adhesive applicator 10 the carpet 1 is coated with the hot-melt adhesive 8.
  • a first information heater 13 and a second infrared heater 14 are arranged in front of and behind the adhesive applicator 10.
  • the first infrared radiator 13 is intended for preheating the underside of the carpet.
  • the second infrared radiator 14 arranged behind the adhesive applicator 10 serves to reheat the carpet 1. Preheating and reheating the carpet enable the hotmelt adhesive to remain in the liquid state for a long time and thus to penetrate deeper into the filament bundle and / or the fabric structure. Depending on the intensity of preheating and preheating, the penetration depth can be controlled or influenced.
  • first 15 and second 16 deflection rollers are arranged in front of and behind the support roller 12, which support the carpet 1 and bring it into the desired position.
  • the adhesive applicator 10 has a slot nozzle 11.
  • the carpet 1 is transported in the direction of the arrow shown. In this embodiment, it is a tufted carpet. However, it is also possible to coat 10 felt, velor or nonwoven webs with the slot nozzle according to the invention.
  • the direction of transport corresponds to the rear view in FIG. 2.
  • the slot nozzle 10 has an outlet slot 17 which extends along the entire width of the slot nozzle 10.
  • the hot melt adhesive emerges from the outlet slot.
  • an inlet edge 18 is arranged in the outlet slot 17. The leading edge falls obliquely to carpet 1 in the transport direction. Due to the incline of the leading edge, the carpet 1 does not get caught on the slot nozzle 11.
  • At least one pocket 19 is arranged at the end of the slot nozzle 10 on the carpet web side. Hot melt adhesive that emerges from the outlet slot 17 is collected in the pocket 19. Due to the longer contact area formed by the pocket 19 with the carpet 1, the hot melt adhesive can penetrate better into the knobs and filaments and their spaces. At its end facing away from the exit slot 17, the pocket has a tear-off edge 20 for the hot-melt adhesive 8.
  • the felt carpet shown in FIG. 4 can be produced by the coating device described above.
  • the felt has a pressed top layer 21 made of filaments. Although the filaments are mechanically, thermally or chemically bonded to one another or matted, however, the filaments must also be bound on the underside of the upper layer in order to achieve a sufficient durability of the felt carpet.
  • the applied hot melt adhesive 8 gives the carpet sufficient strength.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Carpets (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The invention relates to a method for coating grey goods for carpeting (1) comprising an upper layer (21) containing filaments, according to which a thermoplastic material (8) is applied to the upper layer (21) of the underside of the carpet, thus bonding the filaments in the grey goods (1). The invention also relates to a carpet comprising an upper layer of filaments, in which a thermoplastic material (8), which bonds the filaments in the carpet, is applied to the upper layer (21) of the underside of the carpet. In addition, the invention relates to a coating device for coating carpets comprising an upper layer (21) of filaments, said device being provided with transport elements for transporting the carpet (1) along the coating device. The device is also equipped with an applicator for applying the thermoplastic material (8) to the underside of the upper layer (21) of the grey goods that are transported past said applicator.

Description

Verfahren zur Beschichtung einer Teppichrohware mittels einer Breitschlitzdüse Process for coating a carpet raw material by means of a slot die
Die Erfindung betrifft ein Verfahren zur Beschichtung einer Teppichrohware, die eine Oberschicht mit Filamenten aufweist. Die Erfindung betrifft auch einen Teppich selber, der eine Oberschicht mit Filamenten aufweist und eine Beschichtungsvorrichtung für die Beschichtung von Teppichrohwaren.The invention relates to a method for coating a carpet raw material which has an upper layer with filaments. The invention also relates to a carpet itself, which has an upper layer with filaments and a coating device for coating carpet raw materials.
Teppiche und Verfahren zu ihrer Herstellung sind hinlänglich bekannt. Üblicherweise weisen Teppiche eine Oberschicht auf, die unterschiedlich gestaltet sein kann. Die Oberschicht kann aus gepressten Filamenten bestehen, die auch als Gelege oder Gewirr bezeichnet werden. Die Filamente sind dabei gegeneinander verhackt. Derartige Teppiche sind als Filze bekannt. Bei anderen Teppichtypen besteht die Oberschicht aus Garnen, die durch eine Trägermaterialschicht gezogen sind. Bei den Garnen handelt es sich um Filamentbündel. Die Garne können als geschlossene Schlingen in einem Tuftingverfahren durch das Trägermaterial gezogen werden. Durch das Tuftingverfahren werden sog. Tuftingteppiche Teppiche hergestellt. Die Schlingen können aber auch aufgeschnitten sein, und die Schnittschlingen bilden dann Velours aus. Mitunter werden mit Velours auch weiterbehandelte Filze bezeichnet.Carpets and processes for their manufacture are well known. Carpets usually have an upper layer, which can be designed differently. The upper layer can consist of pressed filaments, which are also referred to as scrims or tangles. The filaments are chopped against each other. Such carpets are known as felts. In other types of carpets, the top layer consists of yarns that are pulled through a layer of carrier material. The yarns are filament bundles. The yarns can be drawn through the carrier material as closed loops in a tufting process. By the Tufting processes are so-called tufted carpets. The loops can also be cut open, and the cut loops then form velor. Treated felts are sometimes also referred to as velours.
Unabhängig vom Teppichtyp sind die Oberschichten hohen Abrieb- und Tretbelastungen ausgesetzt, eine gute Filamenteinbindung verhindert die Loslösung der einzelnen Filamente durch die späteren Belastungen. Es gibt verschiedene, normierte Prüfverfahren, wie den Lissonversuch, zur Messung der Tretbelastbarkeit eines Teppichs.Regardless of the type of carpet, the top layers are exposed to high abrasion and treading loads; good filament binding prevents the individual filaments from becoming detached due to the subsequent loads. There are various standardized test methods, such as the Lisson test, for measuring the durability of a carpet.
Bei den bekannten Teppichen erfolgt die Fixierung der Filamente mit Latex. Die Verwendung von Latex hat sich aber als nachteilig erwiesen. Latex entspricht nicht den Vorgaben der Recycelfähigkeit. Verfahren zum Auftragen von Latex sind energieaufwändig, und die zugehörigen Fertigungsstrassen benötigen viel Platz. Versuche andere Formen der Einbindung, z.B. durch Thermoplasten, einzusetzen, scheiterten bisher an der Qualität der Filamenteinbindung. Die Einbindung wurde nicht den Ansprüchen genormter Tret-, Zug- und Scheuerbelastungen gerecht.In the known carpets, the filaments are fixed with latex. However, the use of latex has proven to be disadvantageous. Latex does not meet the requirements for recyclability. Processes for applying latex are energy-intensive and the associated production lines take up a lot of space. Try other forms of integration, e.g. using thermoplastics has so far failed due to the quality of the filament binding. The integration did not meet the requirements of standardized pedal, pull and abrasion loads.
Es ist daher die Aufgabe der vorliegenden Erfindung, gemäß einem ersten Aspekt ein Verfahren zur Beschichtung einer Teppichrohware zur Verfügung zu stellen, bei dem auf eine Latexeinbindung der Filamente verzichtet werden kann, und das dennoch einen belastbaren Teppich zur Verfügung stellt.It is therefore the object of the present invention to provide, according to a first aspect, a method for coating a carpet raw material in which a latex binding of the filaments can be dispensed with, and which nevertheless provides a resilient carpet.
Gemäß einem zweiten Aspekt der Erfindung ist es die Aufgabe der Erfindung, einen haltbaren Teppich ohne Latexeinbindung der Filamente zur Verfügung zu stellen.According to a second aspect of the invention, the object of the invention is to provide a durable carpet without the latex incorporation of the filaments.
Gemäß einem dritten Aspekt der Erfindung ist es die Aufgabe der Erfindung, eine Beschichtungsvorrichtung zur Beschichtung von Teppichrohwaren zur Verfügung zu stellen, die es ermöglicht, belastbare Teppiche ohne Latexeinbindung der Filamente herzustellen. Die Aufgabe wird in ihrem ersten Aspekt durch ein Verfahren zur Beschichtung eines Teppichs gemäß Anspruch - 1 gelöst, indem ein Thermoplast teppichunterseitig auf die Oberschicht aufgebracht wird und die Filamente verklebt werden.According to a third aspect of the invention, the object of the invention is to provide a coating device for coating carpet raw materials, which makes it possible to produce resilient carpets without binding the filaments with latex. In its first aspect, the object is achieved by a method for coating a carpet according to claim 1, in that a thermoplastic is applied to the underside of the carpet on the top layer and the filaments are glued.
Das erfindungsgemäße Verfahren ermöglicht es, die Filamente einer Oberschicht einer Teppichrohware fest in den Teppich einzubinden. Es hat sich nämlich gezeigt, dass eine hinreichende Einbindung der Filamente durch Thermoplastauftrag erfolgen kann. Dabei wird ein Thermoplast auf die Unterseite der Oberschicht aufgetragen. Der Thermoplast verklebt dann die Filamente in der Teppichrohware. Gegenüber Latex sind Thermoplaste und damit auch der ganze Teppich einfacher recycelbar. Vorzugsweise wird zum Auftragen des Thermoplasts eine bestimmte Form einer Schlitzdüse-gewählt, die weiter unten beschrieben wird. Unter Thermoplast wird hier allgemein ein auf Thermoplast basierender Klebstoff oder eine auf Thermoplast basierende Formulierung verstanden.The method according to the invention makes it possible to firmly bind the filaments of an upper layer of a raw carpet material into the carpet. It has been shown that the filaments can be adequately integrated by applying thermoplastic. A thermoplastic is applied to the underside of the top layer. The thermoplastic then glues the filaments in the carpet raw material. Compared to latex, thermoplastics and therefore the entire carpet are easier to recycle. For the application of the thermoplastic, a particular shape of a slot nozzle is preferably selected, which is described further below. Thermoplastic is generally understood to mean a thermoplastic-based adhesive or a thermoplastic-based formulation.
Die Einbindung der Filamente durch Thermoplast ist bei verschiedenen Teppichtypen anwendbar, insbesondere bei Tuftingteppichen, die als Schlingen- oder Velourware ausgebildet sein können aber auch bei Filzen, die ebenfalls als Schlingen- oder Velourware oder als Vlies oder Nadelfilz ausgebildet sein können.The incorporation of the filaments by thermoplastic can be used with various types of carpets, in particular with tufted carpets, which can be designed as loop or velor but also with felts, which can also be designed as loop or velor or as fleece or needle felt.
Tuftingteppiche weisen Garne oder Filamentbündel auf, die durch ein Trägermateriai geführt werden, so dass Filamentbündelabschnitte ober- und unterseitig des Trägermaterials abstehen. Vorzugsweise sind die Filamentbündelabschnitte teppichunterseitig schlingenartig durch das Trägermaterial geführt. Teppichschlingen werden dadurch ausgebildet, dass ein Filamentbündel teppichoberseitig durch das Trägermaterial zur Teppichunterseite geführt wird, durch eine Schlinge umgelenkt wird und von der Teppichunterseite wiederum an einer beabstandeten (Durchstoß-) Stelle durch das Trägermaterial zur Teppichoberseite geführt wird. Die teppichunterseitigen Filamentbündelabschnitte sind nicht fixiert und deshalb sehr empfindlich, weil sie zum einen nur locker durch das Trägermaterial gezogen sind und zum anderen einzelne Filamente leicht aus ihnen herausgerissen werden können. Durch Aufbringen des Thermoplasts auf die Teppichunterseite wird zum einen das gesamte Filamentbündel am Trägermaterial dauerhaft festgeklebt, indem der Thermoplast in Zwischenräume eindringt und den Teppich somit erst haltbar macht. Zum anderen dringt der Thermoplast auch in die Filamentbündel wenigstens teilweise ein, so dass die Filamente in sich verklebt werden. Dringt der Thermoplast im Bereich des äußeren Umfanges der Filamentbündel ein, so weisen sie durch den teilweise in sie eindringenden Klebstoff quasi eine verklebte Schutzhülle auf, die den Teppich zusätzlich haltbar macht" Die mit Thermoplast überzogenen Filamentbündelabschnitte bilden teppichunterseitig somit sogenannte Noppen aus.Tufted carpets have yarns or filament bundles that are guided through a carrier material, so that filament bundle sections protrude above and below the carrier material. The filament bundle sections are preferably looped through the substrate material on the underside of the carpet. Carpet loops are formed in that a filament bundle is passed through the backing material to the underside of the carpet, is deflected by a loop and is in turn guided from the underside of the carpet at a spaced (piercing) point through the backing material to the top of the carpet. The Filament bundle sections on the underside of the carpet are not fixed and are therefore very sensitive because, on the one hand, they are only loosely pulled through the backing material and, on the other hand, individual filaments can easily be torn out of them. By applying the thermoplastic to the underside of the carpet, the entire filament bundle is permanently glued to the backing material by the thermoplastic penetrating into spaces and thus making the carpet durable. On the other hand, the thermoplastic also at least partially penetrates the filament bundle, so that the filaments are glued together. Penetrates the thermoplastic in the region of the outer periphery of the filament bundles one, so they have through the partially penetrating into them adhesive effectively a glued protective cover, which makes the carpet additionally Stable "The coated thermoplastic Filamentbündelabschnitte form carpet underside thus called nubs.
Während die Filamentbündel bei Tuftingteppichen teppichunterseitig Schlingen ausbilden, kann ihre Oberseite unterschiedlich ausgebildet sein, sie kann beispielsweise auch aufgeschnittene Schlingen aufweisen. Alle Arten von Tuftingteppichen eignen sich aber für die erfindungsgemäße Beschichtung.While the filament bundles form loops on the underside of tufted carpets, their upper side can be designed differently, for example they can also have loops cut open. However, all types of tufted carpets are suitable for the coating according to the invention.
In einer anderen Ausführungsform eines Teppichs, die auch als Filz bekannt ist, werden Filamente zur Ausbildung der Oberschicht durch mechanische Verfahren wie Verpressung, Nadeln oder Walken oder durch thermische Verfahren miteinander verbunden. Die Filamente bilden ein Gewirr oder Gelege. Filze weisen teppichunterseitig eine ungeordnete Struktur auf. Zur Fixierung der Filamente wird der Thermoplast teppichunterseitig auf die verpresste Oberschicht aufgetragen. Denn auch bei Filzen hat sich überraschend gezeigt, dass durch Thermoplastauftrag auf einfache Weise eine Filamenteinbindung erfolgen kann. Alternativ kann zwischen den verpressten Filamenten und der Thermoplastschicht auch bei Filzen eine Trägerlage angeordnet sein. Vorzugsweise wird die Oberschicht teppichunterseitig erwärmt und ein Thermoplast teppichunterseitig auf die erwärmte Oberschicht aufgebracht. Das Erwärmen der Teppichrohware vor dem Aufbringen des Thermoplasts, das so genannte Vorwärmen, wird vorzugsweise bei Verwendung von Heißschmelzklebstoffen durchgeführt. Heißschmelzklebstoffe sind bei Umgebungstemperatur fest und bei erhöhten Temperaturen flüssig. Der Heißschmelzklebstoff kühlt bei vorgewärmten Teppichrohwaren langsamer ab und kann dadurch über einen längeren Zeitraum in die Filamentbündelabschnitte eindringen und Filamente nicht nur am äußeren Umfang, sondern auch im Innern der Filamentbündel verkleben. Bei Filzen kann der Thermoplast tiefer in das Gelege bzw. Gewirr eindringen.In another embodiment of a carpet, which is also known as felt, filaments for forming the upper layer are connected to one another by mechanical methods such as pressing, needling or milling or by thermal methods. The filaments form a tangle or scrim. On the underside of the carpet, felts have an unordered structure. To fix the filaments, the thermoplastic is applied on the underside of the carpet to the pressed top layer. Because even with felts it has surprisingly been shown that filament binding can be carried out in a simple manner by applying thermoplastic. Alternatively, a carrier layer can also be arranged between the pressed filaments and the thermoplastic layer in the case of felts. The top layer is preferably heated on the underside of the carpet and a thermoplastic on the underside of the carpet is applied to the heated top layer. The heating of the carpet raw material before the application of the thermoplastic, the so-called preheating, is preferably carried out using hot-melt adhesives. Hot melt adhesives are solid at ambient temperature and liquid at elevated temperatures. The hot-melt adhesive cools more slowly in preheated carpet raw materials and can therefore penetrate into the filament bundle sections over a longer period of time and filaments stick not only to the outer circumference but also to the inside of the filament bundles. With felts, the thermoplastic can penetrate deeper into the scrim or tangle.
In einer besonders bevorzugten Ausführungsform der Erfindung wird der Thermoplast nach dem Aufbringen auf die Unterseite der Oberschicht erwärmt. Ein solches Nachwärmen kann mit dem Vorwärmen kombiniert werden. Das zweifache Erwärmen ermöglicht es dem Thermoplast, insbesondere Heißschmelzklebstoff, besonders tief in die Filamentbündel oder das Gelege einzudringen. Es kann auch eine Steuerung vorgesehen sein, die die Intensität des Vorwärmens und Nachwärmens und somit die Eindringtiefe des Thermoplasts in die Filamente steuert. Vorzugsweise wird zum Erwärmen des Teppichs Infrarotlicht (IR-Licht) verwendet. Die Verwendung von IR-Licht in Kombination mit einem darauf thermisch reagierenden Klebstoff macht es möglich, auf aufwendige Heizaggregate, wie sie bei der Verwendung von Latex zur Filamenteinbindung notwendig sind zu verzichten.In a particularly preferred embodiment of the invention, the thermoplastic is heated after being applied to the underside of the top layer. Such reheating can be combined with preheating. The double heating enables the thermoplastic, in particular hot-melt adhesive, to penetrate particularly deeply into the filament bundle or the scrim. A control can also be provided which controls the intensity of the preheating and post-heating and thus the depth of penetration of the thermoplastic into the filaments. Infrared light (IR light) is preferably used to heat the carpet. The use of IR light in combination with an adhesive that reacts thermally to it makes it possible to dispense with the expensive heating units that are necessary when using latex for filament binding.
Vorzugsweise wird der Thermoplast in einem Kontaktverfahren teppichunterseitig auf die Oberschicht aufgebracht. Dazu kann eine Schlitzdüse oder Breitschlitzdüse verwendet werden. Günstigenfalls wird der Teppich unter einer Einlaufkante eines Austrittsschlitzes der Schlitzdüse vorbei transportiert. Dabei biegen Filamente entgegen der Transportrichtung ab. Sie können sich nach passieren der Einlaufkante entlang der Breite einer taschenartigen Verbreiterung eines Austrittsschlitzes der Schlitzdüse zur Aufnahme des Thermoplasts wieder aufrichten. Die Tasche am Austrittsschlitz ermöglicht einen längeren Kontakt zwischen Teppichrohware und aufzutragendem noch fließendem Klebstoff und damit eine bessere Filamenteinbindung.The thermoplastic is preferably applied on the underside of the carpet to the upper layer in a contact process. A slot nozzle or wide slot nozzle can be used for this. Favorably, the carpet is transported past an inlet edge of an outlet slot of the slot nozzle. Filaments bend against the transport direction. After passing the inlet edge, you can straighten up again along the width of a pocket-like widening of an outlet slot of the slot nozzle for receiving the thermoplastic. The pocket on the outlet slot enables a longer contact between the carpet raw material and the still flowing adhesive to be applied and thus a better filament binding.
In einer bevorzugten Weiterbildung wird auf den aufgetragenen Thermoplast unterseitig ein sogenannter Teppichrücken (backing) aufkaschiert. Der Teppichrücken kann ein Vlies oder Netzmaterial sein. Zum Aufkaschieren des Teppichrückens genügt es, eine hinreichend dicke Thermoplastschicht unterseitig auf die Oberschicht aufzutragen und direkt im Anschluss daran den Teppichrücken aufzukaschieren. Der Thermoplast verklebt den Teppichrücken an der Unterseite. Somit ist es nicht notwendig, eine weitere Beschichtung (zweiter Aufstrich) für das backing zu applizieren. Somit kann ein zusätzlicher Produktionsschritt eingespart werden. Auf eine entsprechende weitere Beschichtungsvorrichtung kann verzichtet werden.In a preferred development, a so-called carpet backing is laminated on the underside of the applied thermoplastic. The carpet backing can be a fleece or a mesh material. To laminate the back of the carpet, it is sufficient to apply a sufficiently thick thermoplastic layer on the underside to the top layer and then immediately laminate the back of the carpet. The thermoplastic glues the back of the carpet to the underside. It is therefore not necessary to apply another coating (second spread) for the backing. An additional production step can thus be saved. A corresponding further coating device can be dispensed with.
Die Aufgabe wird gemäß ihres zweiten Aspektes durch einen Teppich mit den Merkmalen des Anspruchs 12 gelöst, der eine Oberschicht mit Filamenten und ein teppichunterseitig auf die Oberschicht aufgebrachtes Thermoplast aufweist, das-die Filamente im Teppich verklebt.According to its second aspect, the object is achieved by a carpet with the features of claim 12, which has an upper layer with filaments and a thermoplastic applied to the underside of the carpet, which glues the filaments in the carpet.
Der erfindungsgemäße Teppich ist durch wenigstens eines der oben genannten Verfahren herstellbar. Der in die teppichunterseitigen Noppen und/oder Filamente der Oberschicht eindringende Thermoplast gibt dem Teppich eine genormten Belastungstests genügende hinreichende Festigkeit und Haltbarkeit.The carpet according to the invention can be produced by at least one of the methods mentioned above. The thermoplastic penetrating into the knobs and / or filaments of the top layer on the bottom of the carpet gives the carpet a sufficient strength and durability which is sufficient for stress tests.
Sowohl Filze als auch Tuftingteppiche können ein Trägermaterial aufweisen auf das Filamente auf bzw. eingebracht sind. Bei dieser Ausführungsform verklebt der Thermoplast die Filamente zusätzlich mit dem Trägermaterial.Both felts and tufted carpets can have a carrier material on which the filaments are placed or introduced. In this embodiment, the thermoplastic additionally glues the filaments to the carrier material.
Struktur und Materialart des Trägermaterials können verschieden gewählt werden. Das Trägermaterial kann eine Webstruktur aufweisen, die aus einer Mehrzahl von in zwei unterschiedliche Richtungen ausgerichteten Kunststofffäden besteht, wobei Kunststofffäden der einen Richtung abwechselnd über und unter die Kunststofffäden der anderen Richtung geführt und so verwebt sind. Die Kunststofffäden können auch Garne sein. Das Webmuster weist Löcher auf. Bei dieser bevorzugten Ausführungsform des Teppichs sind die Filamentbündel durch die Löcher in dem Webemuster hindurchgeführt. Das ermöglicht eine kostengünstige und einfache Einbringung der Filamente in den Teppich, welche vorzugsweise mittels Heißschmelzklebstoff an der Webstruktur verklebt werden. Der Trägermaterial kann ein geschlossenes Vlies, z.B. ein Spundbond-Vlies sein. Die Trägermaterialien können vielfältig sein.The structure and type of material of the carrier material can be selected differently. The carrier material can have a weave structure that consists of a plurality of oriented in two different directions There are plastic threads, plastic threads in one direction being alternately guided above and below the plastic threads in the other direction and thus woven. The plastic threads can also be yarns. The weave pattern has holes. In this preferred embodiment of the carpet, the filament bundles are passed through the holes in the weave pattern. This enables inexpensive and simple introduction of the filaments into the carpet, which are preferably glued to the weaving structure using hot-melt adhesive. The carrier material can be a closed fleece, for example a bung-bond fleece. The carrier materials can be varied.
Die Aufgabe wird in ihrem dritten Aspekt durch eine erfindungsgerrlaße Beschichtungsvorrichtung für die Beschichtung von Teppichen mit einer Oberschicht mit Filamenten gelöst, wobei die Beschichtungsvorrichtung. Transportelemente zum Transport des Teppichs entlang der Beschichtungsvorrichtung und einen Thermoplastapplikator zum Aufbringen eines Thermoplasts auf eine Unterseite der Oberschicht des am Thermoplastapplikator vorbei transportierten Teppichs aufweist.In its third aspect, the object is achieved by a coating device according to the invention for coating carpets with an upper layer with filaments, the coating device. Transport elements for transporting the carpet along the coating device and a thermoplastic applicator for applying a thermoplastic to an underside of the upper layer of the carpet transported past the thermoplastic applicator.
Die Beschichtungsvorrichtung kann zur Verwendung wenigstens eines der oben beschriebenen Verfahren und zur Beschichtung wenigstens einer der oben beschriebenen Teppichrohwaren verwendet werden. Die beschichteten Teppichrohwaren haben vorzugsweise eine Breite von weniger als einem bis zu wenigen Metern und eine beliebige Länge. Die Beschichtungsvorrichtung eignet sich besonders zur Beschichtung langer Teppichbahnen, die als Rollenware vertrieben wird.The coating device can be used to use at least one of the methods described above and to coat at least one of the carpet raw materials described above. The coated carpet raw materials preferably have a width of less than one to a few meters and any length. The coating device is particularly suitable for coating long carpet webs, which are sold as rolls.
Bei der erfindungsgemäßen Beschichtungsvorrichtung ist ein Thermoplastapplikator vorzugsweise so angeordnet, dass der Thermoplast unterhalb des Thermoplastapplikators, vorzugsweise aus einer Schlitzdüse herausströmt und auf den unterhalb des Thermoplastapplikators angeordneten Teppich aufgebracht wird. Bei dieser Ausführungsform sind keine zusätzlichen Mittel zum Übertragen des Klebstoffs von der Schlitzdüse auf den Teppich notwendig. Der unter dem Thermoplastapplikator transportierte Teppich ist durch eine Beschichtungswalze transportierbar und stützbar.In the coating device according to the invention, a thermoplastic applicator is preferably arranged such that the thermoplastic flows beneath the thermoplastic applicator, preferably out of a slot nozzle, and is applied to the carpet arranged below the thermoplastic applicator. In this embodiment there are no additional means for transferring the adhesive from the slot nozzle on the carpet necessary. The carpet transported under the thermoplastic applicator can be transported and supported by a coating roller.
Vorzugsweise wird ein Klebstoff, insbesondere Heißschmelzklebstoff auf den Teppich aufgetragen. In einer bevorzugten Ausführungsform der Beschichtungsvorrichtung ist vor dem Thermoplastapplikator ein erstes Heizelement und/oder in Transportrichtung nach dem Thermoplastapplikator ein zweites Heizelement angeordnet. Die beiden Heizelemente, die bevorzugt IR-Strahler sind, dienen, wie oben beschreiben, zum Vorwärmen und Nachwärmen des unter dem Klebstoffapplikator hindurchgeführten Teppichs, um ein Eindringen des Heißschmelzklebstoffes in die Unterseite der" Oberschicht zu verbessern und zu unterstützen.An adhesive, in particular a hot-melt adhesive, is preferably applied to the carpet. In a preferred embodiment of the coating device, a first heating element is arranged in front of the thermoplastic applicator and / or a second heating element is arranged after the thermoplastic applicator in the transport direction. The two heating elements, which are preferably IR radiators, serve, as described above, to preheat and reheat the carpet passed under the adhesive applicator in order to improve and support penetration of the hot-melt adhesive into the underside of the " top layer.
Als besonders günstig hat es sich erwiesen, dass der Thermoplastapplikator eine Schlitzdüse zum Auftragen des Thermoplasts, insbesondere Klebstoff, vorzugsweise Heizschmelzklebstoff, aufweist. Die Schlitzdüse kann einen Austrittsschlitz für den Thermoplast und in Transportrichtung vor dem Austrittsschlitz eine schräge Einlaufkante und hinter dem Austrittsschlitz wenigstens eine Tasche aufweisen. Durch die in Transportrichtung zum Teppich hin abgeschrägte Einlaufkante wird ein gleichmäßiges Transportieren des Teppichs unter der Schlitzdüse hinweg ermöglicht, ohne dass der Teppich verhackt. Die hinter der Austrittsöffnung angeordnete Tasche nimmt Thermoplast auf und dient auch zur Bildung einer längeren Kontaktfläche zwischen dem Thermoplast und dem vorbeitransportierten Teppich. Die Tasche ermöglicht es den Noppen und Filamenten sich aufzurichten und zu entspannen, bzw. sich nach Passieren der Einlaufkante wieder zu öffnen. Durch diese spezielle Form der Schlitzdüse wird eine besonders feste Einbindung der Filamente erreicht.It has proven particularly favorable that the thermoplastic applicator has a slot nozzle for applying the thermoplastic, in particular adhesive, preferably hot melt adhesive. The slot nozzle can have an outlet slot for the thermoplastic and, in the transport direction, an inclined inlet edge in front of the outlet slot and at least one pocket behind the outlet slot. The leading edge, which is slanted towards the carpet in the direction of transport, enables the carpet to be transported evenly under the slot nozzle without the carpet getting caught. The pocket arranged behind the outlet opening receives thermoplastic and also serves to form a longer contact surface between the thermoplastic and the carpet being transported past. The bag allows the knobs and filaments to straighten up and relax, or to open again after passing the leading edge. This special shape of the slot nozzle ensures particularly tight integration of the filaments.
Die Erfindung wird anhand von Ausführungsbeispielen beschrieben. Dabei zeigt: Fig. 1 einen schematischen Querschnitt einer bevorzugten Ausführungsform eines Tuftingteppichs, Fig. 2 eine schematische Darstellung einer bevorzugten Ausführungsform einer Beschichtungsvorrichtung, Fig. 3 einen Querschnitt durch eine bevorzugte Ausführungsform einer Schlitzdüse, und Fig. 4 einen Querschnitt durch eine bevorzugte Ausführungsform eines Filzteppichs.The invention is described on the basis of exemplary embodiments. It shows: 1 shows a schematic cross section of a preferred embodiment of a tufted carpet, FIG. 2 shows a schematic representation of a preferred embodiment of a coating device, FIG. 3 shows a cross section through a preferred embodiment of a slot nozzle, and FIG. 4 shows a cross section through a preferred embodiment of a felt carpet.
Der erfindungsgemäße Teppich 1, der in Fig. 1 dargestellt ist, ist ein Tuftingteppich. Er weist ein flächiges Trägermaterial 2 auf, von dem teppichunterseitig Filamentbündelabschnitte 3 abstehen. Teppichoberseitig stehen weitere Filamentbündelabschnitte 4 vom Trägermaterial 2 ab. Die teppichoberseitigen Filamentbündelabschnitte 4 und das Trägermaterial 2 bilden eine Oberschicht 21 des Tuftingteppichs aus. Benachbarte teppichunterseitige Filamentbündelabschnitte 3 sind zu teppichunterseitigen Teppichschlingen 5 verbunden. Benachbarte teppichoberseitige Filamentbündelabschnitte 4 sind zu teppichoberseitigen Teppichschlingen 6 verbunden. Fig. 1 zeigt ein einzelnes Filamentbündel 7, das abschnittsweise teppichunterseitige 3 und teppichoberseitige Filamentbündelabschnitte 4 ausbildet. Das Filamentbündel 7 ist entlang seiner Länge abwechselnd von oben nach unten und umgekehrt durch das Trägermaterial 2 gezogen und bildet dabei entlang seiner Länge die versetzt angeordneten teppichunterseitigen 5 und teppichoberseitigen 6 Teppichschlingen aus.The carpet 1 according to the invention, which is shown in FIG. 1, is a tufted carpet. It has a flat carrier material 2, from which filament bundle sections 3 protrude on the underside of the carpet. Further filament bundle sections 4 protrude from the carrier material 2 on the top of the carpet. The filament bundle sections 4 on the upper side of the carpet and the carrier material 2 form an upper layer 21 of the tufted carpet. Adjacent filament bundle sections 3 on the underside of the carpet are connected to carpet loops 5 on the underside of the carpet. Adjacent filament bundle sections 4 on the carpet are connected to carpet loops 6 on the carpet. 1 shows a single filament bundle 7, which forms sections of the underside 3 of the carpet and filament bundle sections 4 on the top of the carpet. The filament bundle 7 is drawn alternately along its length from top to bottom and vice versa through the backing material 2 and thereby forms the staggered carpet underside 5 and carpet top 6 carpet loops along its length.
Teppichunterseitig ist ein Heißschmelzklebstoff 8 auf die teppichunterseitig abstehenden Filamentbündelabschnitte 3 und die Unterseite des Trägermaterials 2 aufgetragen. Der Heißschmelzklebstoff 8 durchdringt die teppichunterseitigen Filamentbündelabschnitte 3 teilweise oder vollständig und bildet Noppen aus. Zum einen klebt der Heißschmelzklebstoff 8 die teppichunterseitigen Filamentbündelabschnitte 3 an dem Trägermaterial 2 fest und zum anderen festigt er die teppichunterseitigen Filamentbündelabschnitte 3 in sich. Indem der Heizschmelzklebstoff 8 in die teppichunterseitigen Filamentbündelabschnitte 3 eindringt, verklebt er dort die einzelnen Filamente am äußeren Umfang des Filamentbündels 7 und verhindert somit, dass einzelne Filamente aus den teppichunterseitigen Filamentbündelabschnitten 3 herausgezogen werden können.On the underside of the carpet, a hot-melt adhesive 8 is applied to the filament bundle sections 3 protruding from the underside of the carpet and to the underside of the carrier material 2. The hot melt adhesive 8 partially or completely penetrates the filament bundle sections 3 on the underside of the carpet and forms knobs. On the one hand, the hot-melt adhesive 8 sticks the filament bundle sections 3 on the underside of the carpet to the carrier material 2 and, on the other hand, it fixes the filament bundle sections 3 on the underside of the carpet. By placing the hot melt adhesive 8 in the underside of the carpet Filament bundle sections 3 penetrates, he glues the individual filaments there on the outer circumference of the filament bundle 7 and thus prevents individual filaments from being pulled out of the filament bundle sections 3 on the carpet side.
Das Trägermaterial 2 weist eine Web- oder Flechtstruktur (nicht eingezeichnet) auf. Dabei sind in zwei zueinander senkrechten Richtungen Kunststoffgarne in jeder der beiden Richtung parallel zueinander angeordnet. Die Kunststoffgarne der einen Richtung sind abwechselnd über und unter die Kunststoffgarne der anderen Richtung geführt. Teppichunterseitig kann nach der Noppen- und Filamenteinbindung ein Teppichrücken auf die Klebstoffschicht kaschiert werden.The carrier material 2 has a woven or braided structure (not shown). Plastic yarns are arranged parallel to each other in two directions perpendicular to each other. The plastic threads in one direction are alternately guided above and below the plastic threads in the other direction. On the underside of the carpet, after the nubs and filaments have been bound, a carpet back can be laminated onto the adhesive layer.
Die Filamentbündel 7 sind an Durchstoßstellen 9 etwa senkrecht durch das Trägermaterial 2 geführt. Dabei werden die Durchstoßstellen 8 durch die sich in der Flechtstruktur ausbildenden Löcher gebildet und die Filamentbündel 7 sind durch diese Löcher geführt. Die teppichunterseitigen Teppichschlingen 3 bilden zwischen sich und dem Trägermaterial 2 einen Raum aus, der vollständig von Heißschmelzklebstoff 8 gefüllt ist.The filament bundles 7 are guided approximately vertically through the carrier material 2 at piercing points 9. The piercing points 8 are formed by the holes formed in the braiding structure and the filament bundles 7 are guided through these holes. The carpet loops 3 on the underside of the carpet form a space between them and the carrier material 2 which is completely filled with hot-melt adhesive 8.
Fig. 2 zeigt schematisch eine Beschichtungsvorrichtung zur Beschichtung eine Teppichs 1 gemäß Fig. 1. Die Beschichtungsvorrichtung weist einen Klebstoffapplikator 10 auf, der zum Auftragen des Heißschmelzklebstoffes auf eine Unterseite des Teppichs 1 bestimmt ist. Der Klebstoffapplikator 10 weist an seinem teppichseitigen Ende, das in Fig. 2 das untere Ende ist, eine Schlitzdüse 11 auf, durch die Heißschmelzklebstoff flächig auf den unter dem Klebstoffapplikator 10 hindurchlaufenden Teppich 1 teppichbahnunterseitig aufgetragen wird. Der unter dem Klebstoffapplikator 10 durchlaufende Teppich 1 wird von einer Beschichtungswaize 12, die unterhalb des Klebstoffapplikators 10 und gegenüber von diesem angeordnet ist, gestützt. Zwischen dem Klebstoffapplikator 10 und der Beschichtungswaize 12 ist ein kleiner Zwischenraum ausgebildet durch den der Teppich 1 transportiert wird. Der Abstand zwischen Beschichtungswaize 12 und Klebstoffapplikator 10 ist verstellbar, indem der Klebstoffapplikator 10 höhenverstellbar ist. Die Höhenverstellbarkeit des Klebstoffapplikators 10 ist durch den beidseitigen Pfeil angedeutet. Der Auftrag mit dem Klebstoffapplikator 10 ist ein Kontaktauftrag. Die Transportrichtung des Teppichs 1 ist durch die beiden einseitigen Pfeile gekennzeichnet. In Transportrichtung des Teppichs 1 vor dem Klebstoffapplikator 10 ist die Teppichunterseite unbeschichtet und in Transportrichtung hinter dem Klebstoffapplikator 10 ist der Teppich 1 mit dem Heißschmelzklebstoff 8 beschichtet.FIG. 2 schematically shows a coating device for coating a carpet 1 according to FIG. 1. The coating device has an adhesive applicator 10 which is intended for applying the hot-melt adhesive to an underside of the carpet 1. The adhesive applicator 10 has at its carpet-side end, which is the lower end in FIG. 2, a slot nozzle 11, through which hot-melt adhesive is applied flatly to the carpet 1 underneath the carpet web that passes under the adhesive applicator 10. The carpet 1 passing under the adhesive applicator 10 is supported by a coating roller 12 which is arranged below the adhesive applicator 10 and opposite it. A small space is formed between the adhesive applicator 10 and the coating roller 12 through which the carpet 1 is transported. The distance between the coating roller 12 and the adhesive applicator 10 is adjustable by the height of the adhesive applicator 10. The height adjustability of the adhesive applicator 10 is indicated by the arrow on both sides. The order with the adhesive applicator 10 is a contact order. The direction of transport of the carpet 1 is indicated by the two arrows on one side. In the transport direction of the carpet 1 in front of the adhesive applicator 10, the underside of the carpet is uncoated and in the transport direction behind the adhesive applicator 10 the carpet 1 is coated with the hot-melt adhesive 8.
In Transportrichtung des Teppichs 1 vor und hinter dem Klebstoffapplikator 10 ist jeweils ein erster Inforatstrahler 13 bzw. ein zweiter Infrarotstrahler 14 angeordnet. Der erste Infrarotstrahler 13 ist zum Vorwärmen der Teppichunterseite bestimmt. Der hinter dem Klebstoffapplikator 10 angeordnete zweite Infrarotstrahler 14 dient zum Nachwärmen des Teppichs 1. Vor- und Nachwärmen des Teppichs ermöglichen es dem Heißschmelzklebstoff, längere Zeit im flüssigen Zustand zu verbleiben und somit tiefer in die Filamentbündel und/oder die Gewebestruktur einzudringen. Je nach Intensität des Nach- und Vorwärmens ist die Eindringtiefe steuerbar oder beeinflussbar.In the transport direction of the carpet 1, a first information heater 13 and a second infrared heater 14 are arranged in front of and behind the adhesive applicator 10. The first infrared radiator 13 is intended for preheating the underside of the carpet. The second infrared radiator 14 arranged behind the adhesive applicator 10 serves to reheat the carpet 1. Preheating and reheating the carpet enable the hotmelt adhesive to remain in the liquid state for a long time and thus to penetrate deeper into the filament bundle and / or the fabric structure. Depending on the intensity of preheating and preheating, the penetration depth can be controlled or influenced.
In Transportrichtung der Teppichs 1 sind vor und hinter der Stützwalze 12 weitere erste 15 und zweite 16 Umlenkrollen angeordnet, die den Teppich 1 stützen und in die gewünschte Position bringen.In the transport direction of the carpet 1, further first 15 and second 16 deflection rollers are arranged in front of and behind the support roller 12, which support the carpet 1 and bring it into the desired position.
In Fig. 3 ist eine erfindungsgemäße Schlitzdüse 11 im Detail gezeigt. Der Klebstoffapplikator 10 weist eine Schlitzdüse 11 auf. Der Teppich 1 wird in Richtung des eingezeichneten Pfeils transportiert. In diesem Ausführungsbeispiel handelt es sich um eine Tuftingteppichbahn. Es ist jedoch auch möglich, mit der erfindungsgemäßen Schlitzdüse 10 Filz-, Velours- oder Vliesbahnen zu beschichten. Die Transportrichtung entspricht der Rückansicht in Fig. 2. Die Schlitzdüse 10 weist einen Austrittsschlitz 17 auf, der sich entlang der gesamten Breite der Schlitzdüse 10 erstreckt. Aus dem Austrittsschlitz tritt der Heizschmelzklebstoff aus. In Transportrichtung vor dem Austrittsschiitz 17 ist eine Einlaufkante 18 angeordnet. Die Einlaufkante fällt in Transportrichtung schräg zum Teppich 1 ab. Aufgrund der Schräge der Einlaufkante verhackt der Teppich 1 nicht an der Schlitzdüse 11. In Transportrichtung nach dem Austrittsschlitz ist am teppichbahnseitigen Ende der Schlitzdüse 10 wenigstens eine Tasche 19 angeordnet. In der Tasche 19 wird Heizschmelzklebstoff, der aus dem Austrittsschlitz 17 austritt, gesammelt. Aufgrund der durch die Tasche 19 ausgebildeten längeren Kontaktfläche mit dem Teppich 1 kann der Heizschmelzklebstoff besser in die Noppen und Filamente und deren Zwischenräume eindringen. Die Tasche weist an ihrem dem Austrittschlitz 17 abgewandten Ende eine Abrisskante 20 für den Heizschmelzklebstoff 8 auf.3 shows a slot nozzle 11 according to the invention in detail. The adhesive applicator 10 has a slot nozzle 11. The carpet 1 is transported in the direction of the arrow shown. In this embodiment, it is a tufted carpet. However, it is also possible to coat 10 felt, velor or nonwoven webs with the slot nozzle according to the invention. The direction of transport corresponds to the rear view in FIG. 2. The slot nozzle 10 has an outlet slot 17 which extends along the entire width of the slot nozzle 10. The hot melt adhesive emerges from the outlet slot. In the direction of transport an inlet edge 18 is arranged in the outlet slot 17. The leading edge falls obliquely to carpet 1 in the transport direction. Due to the incline of the leading edge, the carpet 1 does not get caught on the slot nozzle 11. In the transport direction after the exit slot, at least one pocket 19 is arranged at the end of the slot nozzle 10 on the carpet web side. Hot melt adhesive that emerges from the outlet slot 17 is collected in the pocket 19. Due to the longer contact area formed by the pocket 19 with the carpet 1, the hot melt adhesive can penetrate better into the knobs and filaments and their spaces. At its end facing away from the exit slot 17, the pocket has a tear-off edge 20 for the hot-melt adhesive 8.
Der in Fig. 4 gezeigte Filzteppich ist ebenso wie der Tuftingteppich in Fig.1 durch die oben beschriebene Beschichtungsvorrichtung herstellbar. Der Filz weist eine verpresste Oberschicht 21 aus Filamenten auf. Die Filamente sind zwar miteinander mechanisch, thermisch oder chemisch verbunden bzw. verfilzt, jedoch müssen auch hier die Filamente auf der Unterseite der Oberschicht eingebunden werden, um eine hinreichende Haltbarkeit des Filzteppichs zu erzeugen. Durch den aufgetragenen Heizschmelzklebstoff 8 erhält der Teppich erst eine hinreichende Festigkeit. The felt carpet shown in FIG. 4, like the tufted carpet in FIG. 1, can be produced by the coating device described above. The felt has a pressed top layer 21 made of filaments. Although the filaments are mechanically, thermally or chemically bonded to one another or matted, however, the filaments must also be bound on the underside of the upper layer in order to achieve a sufficient durability of the felt carpet. The applied hot melt adhesive 8 gives the carpet sufficient strength.

Claims

Ansprüche Expectations
1. Verfahren zur Beschichtung einer Teppichrohware (1), welche eine Oberschicht (21) mit Filamenten (7) aufweist, dadurch gekennzeichnet, dass Thermoplast (8) teppichunterseitig auf die Oberschicht (21) aufgebracht wird und die Filamente in der Teppichrohware (1) verklebt werden.1. A method for coating a raw carpet (1) which has an upper layer (21) with filaments (7), characterized in that thermoplastic (8) is applied to the underside of the carpet on the upper layer (21) and the filaments in the raw carpet (1) be glued.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass Filamente zur Ausbildung der Oberschicht (21) zu einen Gewirr oder Gelege verbunden werden und der Thermoplast in teppichunterseitige Filamente und/oder Zwischenräume zwischen Filamenten eindringt.2. The method according to claim 1, characterized in that filaments for forming the upper layer (21) are connected to a tangle or scrim and the thermoplastic penetrates into the filament underside of the carpet and / or spaces between filaments.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Oberschicht (21) ein in einer Teppichrohwarenebene angeordnetes Trägermaterial (2) aufweist und Filamentbündel (7) quer durch das Trägermaterial (2) geführt werden.3. The method according to claim 1, characterized in that the top layer (21) has a carrier material (2) arranged in a carpet raw material plane and filament bundles (7) are guided transversely through the carrier material (2).
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass der Thermoplast (8) in teppichunterseitig vom Trägermaterial (2) abstehende Filamentbündelabschnitte (3) wenigstens teilweise eindringt und/oder in Zwischenräume. zwischen Filamentbündelabschnitten (3) eindringt.4. The method according to claim 3, characterized in that the thermoplastic (8) at least partially penetrates into the underside of the substrate (2) protruding filament bundle sections (3) and / or in spaces. penetrates between filament bundle sections (3).
5. Verfahren nach wenigstens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Oberschicht (21) teppichunterseitig erwärmt wird und Thermoplast (8) auf die erwärmte Oberschicht (21) teppichunterseitig aufgebracht wird.5. The method according to at least one of the preceding claims, characterized in that the top layer (21) is heated on the underside of the carpet and thermoplastic (8) is applied to the underside of the carpet on the heated top layer (21).
6. Verfahren nach wenigstens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Thermoplast (8) nach dem Aufbringen erwärmt wird. 6. The method according to at least one of the preceding claims, characterized in that the thermoplastic (8) is heated after the application.
7. Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass zum Erwärmen elektromagnetische Strahlung, insbesondere IR-Licht verwendet wird.7. The method according to claim 5 or 6, characterized in that electromagnetic radiation, in particular IR light, is used for heating.
8. Verfahren nach wenigstens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein Heißschmelzklebstoff (8) als Thermoplast verwendet wird.8. The method according to at least one of the preceding claims, characterized in that a hot melt adhesive (8) is used as a thermoplastic.
9. Verfahren nach wenigstens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass eine Schlitzdüse (11) zum Auftragen des Thermoplasts verwendet wird.9. The method according to at least one of the preceding claims, characterized in that a slot nozzle (11) is used for applying the thermoplastic.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Teppichrohware (1) unter einer Einlaufkante (18) der Schlitzdüse (11) transportiert wird und sich Filamente dabei abbiegen und sich entlang der Breite einer Tasche (19) eines Austrittsschlitzes (17) nach Passieren der Einlaufkante (18) zur Aufnahme des Thermoplasts wieder aufrichten.10. The method according to claim 9, characterized in that the carpet raw material (1) is transported under an inlet edge (18) of the slot nozzle (11) and filaments bend and along the width of a pocket (19) of an outlet slot (17) Pass through the inlet edge (18) to hold the thermoplastic.
11. Verfahren nach wenigstens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass nachdem das Thermoplast aufgetragen ist ein Teppichrücken auf die Unterseite der Oberschicht (21) kaschiert wird.11. The method according to at least one of the preceding claims, characterized in that after the thermoplastic has been applied, a carpet back is laminated onto the underside of the upper layer (21).
12. Teppich mit: einer Oberschicht (21) mit Filamenten, gekennzeichnet durch auf teppichunterseitig der Oberschicht (21) aufgebrachtes Thermoplast (8), das die Filamente im Teppich verklebt.12. Carpet with: an upper layer (21) with filaments, characterized by thermoplastic (8) applied to the underside of the upper layer (21), which glues the filaments in the carpet.
13. Teppich nach Anspruch 12, dadurch gekennzeichnet, dass die Oberschicht (21) verpresste Filamente aufweist und der Thermoplast die Oberschicht (21) wenigstens teilweise durchdringt. 13. Carpet according to claim 12, characterized in that the top layer (21) has pressed filaments and the thermoplastic at least partially penetrates the top layer (21).
14. Teppich nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass die Oberschicht (21 ) an ihrer Unterseite ein Trägermaterial (2) aufweist.14. Carpet according to claim 12 or 13, characterized in that the upper layer (21) has a carrier material (2) on its underside.
15. Teppich nach Anspruch 14, dadurch gekennzeichnet, dass die Oberschicht (21) quer durch das Trägermaterial (2) geführte Filamentbündel (7) aufweist und Thermoplast (8) auf teppichunterseitig vom Trägermaterial (2) abstehende Filamentbündelabschnitte (3) aufgebracht ist.15. Carpet according to claim 14, characterized in that the upper layer (21) has filament bundles (7) guided transversely through the carrier material (2) and thermoplastic (8) is applied to filament bundle sections (3) projecting from the carrier material (2) on the underside of the carpet.
16. Teppich nach Anspruch 15, dadurch gekennzeichnet, dass der Klebstoff (8) "die teppichunterseitig vom Trägermaterial (2) abstehenden Filamentbündelabschnitte (3) wenigstens teilweise durchdringt und/oder Zwischenräume zwischen16. Carpet according to claim 15, characterized in that the adhesive (8) " at least partially penetrates the filament bundle sections (3) protruding from the substrate material (2) underneath the carpet and / or spaces between
Filamentbündelabschnitten (3) teilweise oder vollständig füllt.Filament bundle sections (3) partially or completely fills.
17. Teppich nach wenigstens einem der Ansprüche 14, 15 oder 16, dadurch gekennzeichnet, dass das Trägermaterial (2) eine Gewebestruktur aufweist, die aus einer Mehrzahl von in zwei unterschiedliche Richtungen ausgerichteten miteinander verwebten Kunststoffgarnen besteht.17. Carpet according to at least one of claims 14, 15 or 16, characterized in that the carrier material (2) has a woven structure which consists of a plurality of synthetic yarns interwoven in two different directions.
18. Teppich nach Anspruch 14, dadurch gekennzeichnet, dass das Trägermaterial (2) ein Vlies aufweist.18. Carpet according to claim 14, characterized in that the carrier material (2) has a fleece.
19. Teppich nach wenigstens einem der Ansprüche 12 bis 18, dadurch gekennzeichnet, dass der Thermoplast Heißschmelzklebstoff (8) ist.19. Carpet according to at least one of claims 12 to 18, characterized in that the thermoplastic is hot melt adhesive (8).
20. Teppich nach wenigstens einem der Ansprüche 12 bis 19, dadurch gekennzeichnet, dass ein Teppichrücken direkt nach der Noppen- und/oder Filamenteinbindung auf den Thermoplast kaschiert ist 20. Carpet according to at least one of claims 12 to 19, characterized in that a carpet back is laminated onto the thermoplastic directly after the knobs and / or filament binding
21. Beschichtungsvorrichtung für die Beschichtung von Teppichrohwaren mit einer Oberschicht (21) mit Filamenten, mit:21. Coating device for coating carpet raw materials with an upper layer (21) with filaments, with:
Transportelementen (12, 15, 16) zum Transport des Teppichs (1) entlang der Beschichtungsvorrichtung, gekennzeichnet durch einen Thermoplastapplikator (10) zum Aufbringen eines Thermoplasts (8) auf die Unterseite der Oberschicht (21) der am Thermoplastapplikator (10) vorbei transportierten Teppichrohware (1).Transport elements (12, 15, 16) for transporting the carpet (1) along the coating device, characterized by a thermoplastic applicator (10) for applying a thermoplastic (8) to the underside of the upper layer (21) of the raw carpet material transported past the thermoplastic applicator (10) (1).
22. Beschichtungsvorrichtung nach Anspruch 21, gekennzeichnet durch ein in Transportrichtung vor dem Klebstoffapplikator (10) angeordnetes erstes Heizelement (13).22. Coating device according to claim 21, characterized by a first heating element (13) arranged in front of the adhesive applicator (10) in the transport direction.
23. Beschichtungsvorrichtung nach Anspruch 21 oder 22, gekennzeichnet durch ein in Transportrichtung nach dem Klebstoffapplikator (10) angeordnetes zweites Heizelement (14).23. Coating device according to claim 21 or 22, characterized by a second heating element (14) arranged in the transport direction after the adhesive applicator (10).
24. Beschichtungsvorrichtung nach Anspruch 21 , 22 oder 23, dadurch gekennzeichnet, dass das erste und/oder zweite Heizelement (13, 14) ein Infrarotstrahler ist.24. Coating device according to claim 21, 22 or 23, characterized in that the first and / or second heating element (13, 14) is an infrared radiator.
25. Beschichtungsvorrichtung nach wenigstens einem der Ansprüche 21 bis 24, dadurch gekennzeichnet, dass der Thermoplastapplikator (10) eine Schlitzdüse (11 ) zum Auftragen des Thermoplasts (8) aufweist.25. Coating device according to at least one of claims 21 to 24, characterized in that the thermoplastic applicator (10) has a slot nozzle (11) for applying the thermoplastic (8).
26. Beschichtungsvorrichtung nach Anspruch 25, dadurch gekennzeichnet, dass die Schlitzdüse (11) einen Austrittsschlitz (17) aufweist und in Transportrichtung vor dem Austrittsschlitz (17) eine in Transportrichtung zum Teppich (1) abgeschrägte Einlaufkante (18) und hinter dem Austrittsschlitz (17) wenigstens eine zur Teppichrohware (1) geöffnete Tasche (19) in der Schlitzdüse (11) ausgebildet sind. 26. Coating device according to claim 25, characterized in that the slot nozzle (11) has an outlet slot (17) and in the transport direction in front of the outlet slot (17) in the transport direction to the carpet (1) beveled inlet edge (18) and behind the outlet slot (17th ) at least one pocket (19) open to the carpet raw material (1) is formed in the slot nozzle (11).
27. Beschichtungsvorrichtung nach wenigstens einem der Ansprüche 21 bis 26, dadurch gekennzeichnet, dass der Thermoplastapplikator (10) gegenüber einer Beschichtungswaize (12) zum Stützen der Teppichrohware (1) angeordnet ist. 27. Coating device according to at least one of claims 21 to 26, characterized in that the thermoplastic applicator (10) is arranged opposite a coating roller (12) for supporting the carpet raw material (1).
EP04764873A 2003-09-05 2004-09-06 Method for coating grey goods for carpeting using a broad slotted nozzle Withdrawn EP1660715A1 (en)

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DE10341399A DE10341399A1 (en) 2003-09-05 2003-09-05 Process for coating a raw carpet product by means of a slot die
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