DE812610C - Method and device for the continuous provision of nonwovens with pulverulent binders - Google Patents

Method and device for the continuous provision of nonwovens with pulverulent binders

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Publication number
DE812610C
DE812610C DED1479A DED0001479A DE812610C DE 812610 C DE812610 C DE 812610C DE D1479 A DED1479 A DE D1479A DE D0001479 A DED0001479 A DE D0001479A DE 812610 C DE812610 C DE 812610C
Authority
DE
Germany
Prior art keywords
fleece
box
binder
gas stream
nonwovens
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.)
Expired
Application number
DED1479A
Other languages
German (de)
Inventor
Michael Dipl-Ing Wienand
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Priority to DED1479A priority Critical patent/DE812610C/en
Application granted granted Critical
Publication of DE812610C publication Critical patent/DE812610C/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
    • D21H5/0007—Pretreatment of paper to which liquids or other fluent materials are to be applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/06—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam for articles of indefinite length
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4835—Heat curing adhesives
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/486—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by their physical form being non-liquid, e.g. in the form of granules or powders
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/60—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/30—Pretreatment of the paper
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • B29C2035/047—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames other than air
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • B29C2035/047—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames other than air
    • B29C2035/048—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames other than air inert gas
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8266—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8266—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined
    • B29C66/82661—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined by means of vacuum

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Nonwoven Fabrics (AREA)

Description

Verfahren und Vorrichtung zum fortlaufenden Versehen von Faservliesen mit pulverförmigen Bindemitteln l)ie Erfindung l)ezieht sich auf ein Verfahren zum fortlaufenden Verseheii von Faservliesen mit pulverförmigen, wärmeplastischen oder wärmehärtbaren Bindemitteln. Bisher hat man diese Aufgabe in der \N'eise gelöst, daß das Bindemittel entweder während der llerstellung des Vlieses aus einem Faserbrei diesem in pulverförmigem oder gelöstem Zustand beigegeben wur(le, oder man hat das Bindemittel iii gelöstem Zustand auf das noch feuchte Faservlies aufgebracht. l)ie Beigabe des Bindemittels zu dem Faserstoffbrei verbürgt zwar eine gleichmäßige Verteilung, jedoch gehen beim Entwässern größere Mengen desselben verloren. Beim nachträglichen Imprägnieren des Faservlieses entstehen zwar keine Verluste. jedoch ist eine gleichmäßige Verteilung nicht ohne weiteres gewährleistet. In allen Fällen erfordert das Faservlies eine Trocknung vor der Weiterbehandlung, für die erhebliche Wärmemengen zusätzlich aufgewendet werden müssen.Method and device for the continuous coating of nonwovens with pulverulent binders l) he invention l) relates to a method for continuous verseheii of nonwovens with powdery, thermo-plastic or thermosetting binders. So far this task has been solved in the \ N way that the binder either during the production of the fleece from a fiber pulp Was added to this in a powdery or dissolved state, or you have that Binder iii dissolved state applied to the still moist nonwoven fabric. l) ie The addition of the binder to the pulp guarantees even distribution, however, larger amounts of the same are lost during dewatering. With subsequent Impregnation of the fiber fleece does not result in any losses. however, is a uniform Distribution not guaranteed. In all cases the nonwoven fabric requires drying before further treatment, for which additional considerable amounts of heat are required must be spent.

Bei der Erfindung werden diese Nachteile dadurch vermieden, daß das Bindemittel durch ein gasförmiges Nledium, wie z. B. Stickstoff, Kohlendioxyd oder ein anderes inertes Gas in das auf die Erweichungs- oder Schmelztemperatur des Bindemittels vorgewärmte Faservlies eingebracht wird. Die von dem Gasstrom getragenen staubfreien Bindemittelteilchen erwärmen sich bei der Berührung mit den heißen Fasern, erweichen hierbei und bleiben kleben. In the invention, these disadvantages are avoided in that the Binder by a gaseous Nledium, such as. B. nitrogen, carbon dioxide or another inert gas in the one at the softening or melting temperature of the binder preheated fiber fleece is introduced. The dust-free ones carried by the gas stream Binder particles heat up when they come into contact with the hot fibers and soften here and stick.

Die Erfahrung hat gezeigt, daß trotz der schnellen Verklebung das pulverförmige Bindemittel sehr gleichmäßig über den ganzen Querschnitt der Faserstoffbahn verteilt wird. Das schnelle Festhaften der Pulverteilchen an den Fasern wird noch dadurch begünstigt, daß der gasförmige Träger zweckmäßig eine geringere Temperatur aufweist als die Fasern lzw. als der Schmelz- oder Erweichungstemperatur des Bindemittels entspricht.Experience has shown that, despite the quick bonding, the powdery binders very evenly over the entire cross-section of the fibrous web is distributed. The powder particles will quickly adhere to the fibers favored by the fact that the gaseous carrier is expedient a lesser one Has temperature than the fibers lzw. than the melting or softening temperature of the binder.

Eine Vorrichtung zur Durchführung des Verfahrells l>esteht gemäß der Erfindung aus einer das Faservlies kastenförmig umschließenden Wärmekammer, durch welche ein heißer Gasstrom gedrückt oder gesaugt wird, und einer daran anschließenden, das Vlies kastenförmig umgebenden Bestäubungskammer, in welcher ein mit dem Bindemittelpulver beladener, vorzugsweise kalter Gasstrom durch das Vlies gedrückt oder gesaugt wird, wobei zwischen deii leiden Kästen sowie am Eintritts- und Austrittsende derselben schlitzförmige Offnungen zur Durchführung des Vlieses angeordnet sind. Die Gasströme werden in an sich bekannter Weise mittels Ventilatoren durch das Faservlies hindurchgedrückt, Vor Eintritt in die Wärmekammer wird der Gasstrom durch eine besondere vorgeschaltete, direkt oder indirekt wirkende Heizung, wie z. B. eine elektrische Widerstandsheizung, auf die gewünschte Temperatur gebracht. A device for carrying out the process is according to FIG of the invention from a heating chamber enclosing the fiber fleece in a box shape, through which a hot gas stream is pressed or sucked, and a subsequent, the dusting chamber surrounding the fleece in a box-shaped manner, in which a powdered binder loaded, preferably cold gas stream is pressed or sucked through the fleece, boxes between the two and at the entry and exit ends of the same Slit-shaped openings for the implementation of the fleece are arranged. The gas flows are pushed through the fiber fleece in a known manner by means of fans, Before entering the heating chamber, the gas flow is passed through a special upstream, direct or indirect heating, such as B. an electrical resistance heater, brought to the desired temperature.

In der Bestäubungskammer wird' gemäß der Erfindung der Gasstrom vorteilhaft dazu benutzt, um den Staub in regelbaren Mengen einerAufgabevorrichtung zu entnehmen. Diese besteht aus einer einen in der Kasten!decke angeordneten Aufgabetrichter dicht verschließenden vorzugsweise schräg gerasterten Walze, von welcher das hei der Drehung aus dem Fülltrichter portionsweise entnommene pulverü).rmige Bindemittel unmittelbar abgeblasen wird. According to the invention, the gas flow is advantageous in the dusting chamber used to remove the dust in controllable quantities from a feeding device. This consists of a hopper arranged in the top of the box, tightly sealed closing roller, preferably diagonally rasterized, of which that is the rotation Powdery binders removed in portions from the filling funnel immediately is blown off.

Die Anwendung einer mit einem feinen, z. B. Linienraster versehenen Walze vermittelt gegenüber den l,'kannten Aufgabetrommeln mit Rippen, Stegen o.dgl.denVorteil, daß dasAufgabegut in ganz geringeil Niengen aufgegeben werden kann, sodaß z. B. der prozentuale Anteil an Bindemitteln in der fertigen Faserplatte nur etwa 2 bis 4% oder noch weniger beträgt. Der auf diese Weise mit Bindemittelstaubteilchen angereicherte Gasstrom dringt durch das Vlies, während die Staubteilchen im wesentlichen zurückbleiben. Bei der Vorrichtung ist zweckmäßig die Aufgabeseite des Kastens mit der Druckseite des Ventilators und die andere Seite mit der Saugseite des Ventilators verbunden, so daß dieser selbst frei von Bindemittelteilchen bleibt. In gleicher Weise ist auch der Ventilator der Wärmezone geschaltet, um eine Erhitzung zu vermeiden. Das Faservlies wird fortlaufend mittels eines Transportbandes durch die Wärme- und Zerstäubungszone bewegt.The application of a with a fine, e.g. B. Line grid provided The roller provides the advantage over the familiar feed drums with ribs, webs or the like that the task can be given up in very little Niengen, so that z. B. the percentage of binders in the finished fiberboard is only about 2 to 4% or less. The one enriched in this way with binder dust particles Gas flow penetrates through the fleece, while the dust particles essentially remain behind. In the device, the feed side of the box with the pressure side is expedient of the fan and the other side connected to the suction side of the fan, so that this itself remains free of binder particles. In the same way is the fan of the heating zone is also switched on in order to avoid overheating. That Nonwoven fabric is moved continuously through the heat and atomization zone by means of a conveyor belt emotional.

In der Zeichnung ist die Vorrichtung gemäß der Erfindung in einer beispielsweise Ausführungsform schematisch dargestellt. Das Faservlies 1 wird mittels des Transportbandes 2 zunächst in die durch den Kasten 3 gebildete Wärmekammer 4 gebracht, die das Faservlies von allen Seiten umschließt. Ein Velltilator 5 drückt das vorgewärmte Gas durch die mit der Heizung 6 versehene Rohrleitung 7 in die Wärmekammer und durch das Faservlies hindurch, wobei die Wärme an dieses abgegeben wird. Das abgekühlte Gas gelangt dann durch die Leitung 8 wieder in den Ventilator zurück. Aus der Wärmezone gelangt dann das Faservlies über das Transportband 9 in die Bestäul>ungszone 10, die ebenfalls von einem das Faservlies auf beiden Seiten umschließenden Kasten 1 1 begrenzt ist. Im oberen Teil dieses Kastens ist die mit einem Raster versehene Aufgabewalze 12 drehbar angeordnet, welche den in der oberen Wand des Kastens 1 1 eingebauten Fülltrichter I3 nach innen zu dicht abschließt. Bei der Drehung der Walze I2 wird durch das Raster pulverförmiges Bindemittel entnommen, dessen Menge durch Änderung der Walzendrehzahl regelbar ist, wobei ein Rakel 14 dicht über der Walze angeordnet ist, so daß nur die im Raster hefindlichen Staubteilchen aus dem Fülltrichter austreten können. Die von dem Ventilator 15 geförderte Gasmenge wird durch die Rohrleitung I6 über die Düse 17 auf die Walze aufgeblasen. Die Staubteilchen lösen sich hierbei aus den von dem Raster gebildeten Vertiefungen und gelangen zusammen mit dem Gasstrom in das Faservlies, wo sie sich an den heißen Fasern erwärmen und klebenbleilien. Das von Bindemitteln fast befreite Gas gelangt dann über die Leitung i8 und den Reiniger 19 in den Ventilator 15 zurück. In the drawing, the device according to the invention is in a example embodiment shown schematically. The nonwoven fabric 1 is by means of of the conveyor belt 2 first in the heating chamber 4 formed by the box 3 brought, which encloses the fiber fleece on all sides. A fan 5 presses the preheated gas through the pipe 7 provided with the heater 6 into the heating chamber and through the nonwoven fabric, the heat being given off to it. That The cooled gas then returns to the fan through line 8. The fiber fleece then passes from the heating zone via the conveyor belt 9 into the dusting zone 10, also by a box enclosing the fiber fleece on both sides 1 1 is limited. In the upper part of this box is the one with a grid Feed roller 12 rotatably arranged, which in the upper wall of the box 1 1 built-in hopper I3 closes too tightly on the inside. When rotating the Roller I2, the amount of powdered binder is removed through the grid can be regulated by changing the roller speed, with a doctor blade 14 close above the Roller is arranged so that only the dust particles in the grid hostile to the Filling funnel can escape. The amount of gas delivered by the fan 15 is inflated through the pipe I6 via the nozzle 17 onto the roller. The dust particles solve this from the depressions formed by the grid and come together with the gas flow into the nonwoven fabric, where they heat up on the hot fibers and sticking leads. The gas, which has almost been freed of binding agents, then passes through the pipe i8 and the cleaner 19 back into the fan 15.

PATENTANSPROCHE: I. Verfahren zum fortlaufenden Versehen von Faservliesen mit pulverförmigen, wärmeplastischen oder wärmehärtbaren Bindemitteln, dadurch gekennzeichnet, daß das Bindemittel im staubförmigen Zustand durch ein gasförmiges inertes Mittel in das auf die Erweichungs- oder Schmelztemperatur des Bindemittels vorgewärmte Faservlies eingebracht wird. PATENT CLAIM: I. Process for the continuous coating of nonwovens with powdery, thermo-plastic or thermosetting binders, characterized in that that the binder in the powdery state by a gaseous inert agent into the preheated to the softening or melting temperature of the binder Fiber fleece is introduced.

Claims (1)

2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch I, gekennzeichnet durch Anordnung einer das Faservlies I kastenförmig umschließenden Wärmekammer (4), durch welche ein heißer Gasstrom gedrückt oder gesaugt wird, und einer daran anschließenden das Vlies kastenförmig umgehenden Bestäubungskammer (11), in welche ein mit dem Bindemittelpulver beladener vorzugsweise kalter Gasstrom durch das Vlies gedrückt oder gesaugt wird, wol)ei zwischen den heiden Kästen sowie am Eintritts-und Austrittsende dersellien schlitzförmige t)ffnungen zur Durchführung des Vlieses angeordnet sind. 2. Apparatus for performing the method according to claim I, characterized by arranging a heating chamber (4) enclosing the fiber fleece I in the shape of a box, through which a hot gas stream is pressed or sucked, and one following it the non-woven box-shaped surrounding dusting chamber (11), in which a with the Binder powder-laden, preferably cold gas stream pressed through the fleece or is sucked, wol) ei between the two boxes as well as at the inlet and outlet ends dersellien slot-shaped openings are arranged for the passage of the fleece. 3. Vorrichtung nach Anspruch 2, gekennzeichnet durch Anordnung einer mit einem Raster versehenen Walze (I2), von welcher das aus einem über der Trommel in der Kastendecke angeordneten Fülltrichter (I3) portionsweise entnommene pulverförmige Bindemittel mittels eines Gasstromes abgeblasen wird. 3. Apparatus according to claim 2, characterized by the arrangement of a provided with a grid roller (I2), of which the one above the drum Powdery funnel (I3) removed in portions from the hopper (I3) in the top of the box Binder is blown off by means of a gas stream.
DED1479A 1950-03-18 1950-03-18 Method and device for the continuous provision of nonwovens with pulverulent binders Expired DE812610C (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021289B (en) * 1955-07-07 1957-12-19 Actien Ges Der Gerresheimer Gl Process for the production of sound absorbing plates
DE1096324B (en) * 1957-01-19 1961-01-05 Staflex Company Ltd Process for producing a sheet-like interlining material
DE1111933B (en) * 1954-03-09 1961-07-27 Chavannes Ind Synthetics Inc Method and system for producing upholstery wadding from fiber layers
DE1115212B (en) * 1956-05-12 1961-10-19 Dunlop Rubber Co Method and device for coating fabric webs
DE1222648B (en) * 1956-03-01 1966-08-11 Wtz Feikeramischen Ind Device for evenly spreading powder moving on an endless conveyor belt
WO1992013124A1 (en) * 1991-01-15 1992-08-06 Poly Id Ag Process and device for processing fibre pieces

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111933B (en) * 1954-03-09 1961-07-27 Chavannes Ind Synthetics Inc Method and system for producing upholstery wadding from fiber layers
DE1021289B (en) * 1955-07-07 1957-12-19 Actien Ges Der Gerresheimer Gl Process for the production of sound absorbing plates
DE1222648B (en) * 1956-03-01 1966-08-11 Wtz Feikeramischen Ind Device for evenly spreading powder moving on an endless conveyor belt
DE1115212B (en) * 1956-05-12 1961-10-19 Dunlop Rubber Co Method and device for coating fabric webs
DE1096324B (en) * 1957-01-19 1961-01-05 Staflex Company Ltd Process for producing a sheet-like interlining material
WO1992013124A1 (en) * 1991-01-15 1992-08-06 Poly Id Ag Process and device for processing fibre pieces
US5395412A (en) * 1991-01-15 1995-03-07 Poly Id Ag Method and apparatus for the treatment of fiber pieces

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