EP1315862B1 - Method and device for producing nonwovens - Google Patents
Method and device for producing nonwovens Download PDFInfo
- Publication number
- EP1315862B1 EP1315862B1 EP01984852A EP01984852A EP1315862B1 EP 1315862 B1 EP1315862 B1 EP 1315862B1 EP 01984852 A EP01984852 A EP 01984852A EP 01984852 A EP01984852 A EP 01984852A EP 1315862 B1 EP1315862 B1 EP 1315862B1
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- EP
- European Patent Office
- Prior art keywords
- binder
- nonwoven material
- gas flow
- organ
- material 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.)
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- 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
- D04H1/64—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 wet state, e.g. chemical agents in dispersions or solutions
- D04H1/655—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 wet state, e.g. chemical agents in dispersions or solutions characterised by the apparatus for applying bonding agents
-
- 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
- D04H1/587—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 characterised by the bonding agents used
-
- 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
- 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
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
-
- 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
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/736—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged characterised by the apparatus for arranging fibres
-
- 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
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
Definitions
- the invention relates to a method and an apparatus for the production of nonwovens in the preambles of claims 1 and 6 genus.
- the invention has for its object to be as simple as possible Way to ensure evenly formed nonwovens, i.e. very low tolerances, for example, of the basis weight or other properties of the nonwoven produced observed. It is also desirable to have such properties simple way by adjusting the proportion of the binder or other additives to control the nonwoven material.
- the nonwoven material is in the form of a layer moved forward.
- the gas flow is in front of the actual mixing zone mixed with the binder to form a binder gas stream, which is blown onto and / or into the nonwoven material layer becomes.
- the flow rate of the binder gas flow chosen so high that binder in the nonwoven material layer is torn in and thereby the Conveying speed of the nonwoven material increased.
- the angle of attack of the binder gas flow should be up to 60 °, especially up to 20 ° in relation to the Direction of conveyance of the nonwoven material layer.
- the nonwoven material layer in the Binder Gas Stream One Impact Area Has layer thickness of about 0.1 to 30 cm. Furthermore it is recommended if the pressure is at the point of the meeting in a widening cross-section Mixing chamber can relax, creating even better mixing the particularly granular and granulated Binder with the differently structured, namely fibrous nonwoven material can be made. From this mixing chamber the mixture should in particular be used as a sieve drum trained feed member fall on the transport member or are pushed there by the feed element. The Mixture there forms a band with a width between in particular 1 and 3 m.
- the invention enables the smallest tolerances of the pressed and possibly deformed fleece to be observed. Up to 35% of binders and additives can be added to meet certain physical properties, particularly for acoustic applications and dimensional stability, even when the installed fleece has large temperature differences.
- Basis weights of the nonwoven between about 400 and 2500 g / m 2 and density between 50 and 300 kg / m 3 can be achieved with nonwovens, for example, sound absorbing well and densities between 300 and 1500 kg / m 3 for molded parts of motor vehicles, for example, serving as interior linings.
- torn fibers from Cotton and thermoplastics as well as biko fibers are particularly preferred as the binder.
- the proportion of the binder or other additives is very high easily controllable by pre-dosing these materials With the help of, for example, dosing screws or dosing belt scales and also by the respective pressure with which the inflow speed of the binder gas flow to the nonwoven material layer can be adjusted.
- v 20 up to 70 m / s binder 2 with the main flow component A from the feed member 12 at a flow rate of ejects for example 50 m / sec.
- D 1 cm on.
- the angle of attack ⁇ between the flow component A and the conveying direction F of the nonwoven material layer 5 in the area of impact is preferably about 0 to 5 °.
- the feed member 14 the mixture layer then conveys it to a transport member 4 formed conveyor belt with a width of, for example 2.5 m and a thickness of 5 cm, for example.
- the transport organ 4 transports the belt 7 of the mixture layer to one Injection station, not shown. There is the binder heated until melting. Since the binder powder or Binder granulate already works well with the fibers of the nonwoven material is mixed, short fleece sections are sufficient to press and solidify for a good and even bond the fleece material particles and possibly other additives with each other to care.
- the band 7 can be further shaped in or after the pressing station and / or cut into fleece mats.
- thermoplastic serving as binder 2 trickles Phenolic resin from a collection container 16 down to via a screw conveyor 17 to a metering screw 18 arrive at which a pre-metering takes place.
- the binder 2 leaves the dosing screw 18 via a funnel a dosing belt scale 19 in which the fine dosing takes place from there to be fed to a cyclone 20 in free fall, fed into the air at high speeds of up to 70 m / s becomes.
- the binder gas stream 6 is generated and then via connecting channels to the feed member 12 of the invention Device to be fed.
- a broad one Slot nozzle 8 can also several, in the example according to Figure 4, seven individual nozzles across the width of the nonwoven material layer 5 can be distributed.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
- Peptides Or Proteins (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung
zur Herstellung von Vliesen der in den Oberbegriffen
der Patentansprüche 1 und 6 genannten Gattung.The invention relates to a method and an apparatus
for the production of nonwovens in the preambles
of
Derartige Verfahren und Vorrichtungen sind bereits bekannt (US-A-5 569 489 und US-A-4 971 742). Dabei werden die Fasern des Vliesmaterials im freien Fall unter Zuhilfenahme eines Gasstromes mit dem gleichfalls im freien Fall zugeführten Bindemittel vermischt und auf einem Transportorgan ausgebreitet. Sofern aus dem Vliesmaterial durch Komprimieren der Vliesstofffasern zuerst eine Matte hergestellt wird, findet vor dem Vermischen mit dem Bindemittel wieder eine Vereinzelung der einzelnen Fasern der vliesmaterialschicht statt.Such methods and devices are already known (US-A-5 569 489 and US-A-4 971 742). The fibers of the nonwoven material in free fall with the help of a Gas flow with that also supplied in free fall Binder mixed and spread on a transport organ. If from the nonwoven material by compressing the Nonwoven fibers first find a mat is made separate again before mixing with the binder of the individual fibers of the nonwoven material layer instead.
Darüber hinaus ist es bekannt (US-A-4 018 646), aus unterschiedlich langen Fasern hergestellte Vliese nachträglich mit Bindemitteln zu behandeln, was beispielsweise durch Aufsprühen des Bindemittels geschieht. Bei diesem Verfahren findet eine sehr ungleichmäßige Verteilung des Bindemittels innerhalb der Vliesmatte statt. In addition, it is known (US-A-4 018 646) from various nonwovens made with long fibers Treat binders, for example by spraying of the binder happens. With this procedure one finds very uneven distribution of the binder within the Fleece mat instead.
Der Erfindung liegt die Aufgabe zugrunde, auf möglichst einfache Weise für gleichmäßig ausgebildete Vliese zu sorgen, d.h. sehr geringe Toleranzen beispielsweise des Flächengewichts oder anderer Eigenschaften des hergestellten Vlieses einzuhalten. Ferner ist es erwünscht, solche Eigenschaften auf einfache Weise durch Einstellen des Anteils der Bindemittel bzw. anderer Zusatzstoffe zum Vliesmaterial steuern zu können.The invention has for its object to be as simple as possible Way to ensure evenly formed nonwovens, i.e. very low tolerances, for example, of the basis weight or other properties of the nonwoven produced observed. It is also desirable to have such properties simple way by adjusting the proportion of the binder or other additives to control the nonwoven material.
Die Erfindung ist in den Ansprüchen 1 und 6 gekennzeichnet und
in weiteren Unteransprüchen sind bevorzugte Ausbildungen beansprucht.
Darüber hinaus werden anhand der Zeichnung im folgenden
besonders vorteilhafte Ausbildungen der Erfindung näher
erläutert.The invention is characterized in
Bei der Erfindung wird das Vliesmaterial in Form einer Schicht vorwärts bewegt. Der Gasstrom wird vor der eigentlichen Mischzone mit dem Bindemittel zu einem Bindemittel-Gas-Strom vermischt, der auf und/oder in die Vliesmaterialschicht geblasen wird. Dabei wird die Strömungsgeschwindigkeit des Bindemittel-Gas-Stromes so hoch gewählt, daß Bindemittel in die Vliesmaterialschicht hineingerißen wird und sich hierdurch die Fördergeschwindigkeit des Vliesmaterials erhöht.In the invention, the nonwoven material is in the form of a layer moved forward. The gas flow is in front of the actual mixing zone mixed with the binder to form a binder gas stream, which is blown onto and / or into the nonwoven material layer becomes. The flow rate of the binder gas flow chosen so high that binder in the nonwoven material layer is torn in and thereby the Conveying speed of the nonwoven material increased.
Dabei empfiehlt sich das Einblasen des Bindemittel-Gas-Stromes durch eine oder vorzugsweise mehrere Düsen in die Vliesmaterialschicht. Der Anstellwinkel des Bindemittel-Gas-Stromes sollte bis zu 60°, insbesondere bis zu 20° in Bezug zur Förderrichtung der Vliesmaterialschicht betragen.It is advisable to blow in the binder gas stream through one or preferably several nozzles into the nonwoven material layer. The angle of attack of the binder gas flow should be up to 60 °, especially up to 20 ° in relation to the Direction of conveyance of the nonwoven material layer.
Ferner empfiehlt es sich, wenn die Vliesmaterialschicht im Bereich des Auftreffens des Bindemittel-Gas-Stroms eine Schichtdicke von etwa 0,1 bis 30 cm aufweist. Darüber hinaus empfiehlt es sich, wenn sich der Druck an der Stelle des Zusammentreffens in einer sich im Querschnitt aufweitenden Mischkammer entspannen kann, wodurch eine noch bessere Vermischung der insbesondere körnigen und als Granulat ausgebildeten Bindemittel mit dem anders strukturierten, nämlich faserförmigen Vliesmaterial erfolgen kann. Aus dieser Mischkammer sollte das Gemisch insbesondere über ein als Siebtrommel ausgebildetes Vorschuborgan auf das Transportorgan fallen bzw. von dem Vorschuborgan dorthin vorgeschoben werden. Das Gemisch bildet dort ein Band einer Breite zwischen insbesondere 1 und 3 m.It is also recommended if the nonwoven material layer in the Binder Gas Stream One Impact Area Has layer thickness of about 0.1 to 30 cm. Furthermore It is recommended if the pressure is at the point of the meeting in a widening cross-section Mixing chamber can relax, creating even better mixing the particularly granular and granulated Binder with the differently structured, namely fibrous nonwoven material can be made. From this mixing chamber the mixture should in particular be used as a sieve drum trained feed member fall on the transport member or are pushed there by the feed element. The Mixture there forms a band with a width between in particular 1 and 3 m.
Statt einer Düse können auch mehrere Düsen über die Breite der Vliesmaterialschicht verteilt sein, da die o.g. Mischkammer zu einer Vergleichmäßigung der verwirbelten Materialien beiträgt. In vielen Anwendungsfällen empfiehlt sich aber, eine einzige Düse mit einer lichten Breite von zwischen etwa 0,9 und 3,5 m über die Gesamtbreite der zugeführten Vliesmaterialschicht.Instead of one nozzle, it is also possible to use several nozzles across the width of the Non-woven material layer must be distributed, since the above. Mixing chamber too contributes to an equalization of the swirled materials. In many applications, however, one is recommended Nozzle with a clear width of between about 0.9 and 3.5 m across the total width of the supplied nonwoven material layer.
Die Erfindung ermöglicht die Einhaltung geringster Toleranzen des verpressten und ggf. verformten Vlieses. So können Bindemittel und Zusatzstoffe bis zu 35% beigemischt sein, um - bestimmten physikalischen Eigenschaften insbesondere für schalltechnische Anwendungen und Formbeständigkeit auch bei starken Temperaturunterschieden des eingebauten Vlieses zu genügen. Dabei sind Flächengewichte des Vlieses zwischen etwa 400 und 2500 g/m2 und Raumgewicht zwischen 50 und 300 kg/m3 bei beispielsweise Schall gut absorbierenden Vliesen und Raumgewichte zwischen 300 und 1500 kg/m3 für beispielsweise als Innenauskleidungen dienende Formteile von Kraftfahrzeugen erreichbar.The invention enables the smallest tolerances of the pressed and possibly deformed fleece to be observed. Up to 35% of binders and additives can be added to meet certain physical properties, particularly for acoustic applications and dimensional stability, even when the installed fleece has large temperature differences. Basis weights of the nonwoven between about 400 and 2500 g / m 2 and density between 50 and 300 kg / m 3 can be achieved with nonwovens, for example, sound absorbing well and densities between 300 and 1500 kg / m 3 for molded parts of motor vehicles, for example, serving as interior linings.
Als Vliesmaterial werden insbesondere vorgerissene Fasern von Baumwolle und thermoplastischen Kunststoffen sowie Biko-Fasern. Bevorzugt als Bindemittel dient insbesondere Phenolharz.In particular, torn fibers from Cotton and thermoplastics as well as biko fibers. Phenolic resin is particularly preferred as the binder.
Der Anteil des Bindemittels bzw. anderer Zusatzstoffe ist sehr leicht steuerbar durch Vordosierung dieser Materialien mit Hilfe von beispielsweise Dosierschnecken oder Dosierbandwaagen sowie auch durch den jeweiligen Druck, mit dem die Zuströmgeschwindigkeit des Bindemittel-Gas-Stromes zur Vliesmaterialschicht eingestellt werden kann.The proportion of the binder or other additives is very high easily controllable by pre-dosing these materials With the help of, for example, dosing screws or dosing belt scales and also by the respective pressure with which the inflow speed of the binder gas flow to the nonwoven material layer can be adjusted.
In der Zeichnungen zeigen:
- Figur 1
- einen schematischen Querschnitt durch eine erfindungsgemäße Vorrichtung;
Figur 2- einen schematischen Teilausschnitt von Figur 1 im Bereich der Mischkammer 13;
Figur 3- einen vergrößerten Ausschnitt aus dem Bereich
der Zuführung des Bindemittel-Gas-
Stromes 6 an/in dieVliesmaterialschicht 5 und Figur 4- eine schematische Ansicht der Vordosierung des Bindemittels und Antriebsgases.
- Figure 1
- a schematic cross section through a device according to the invention;
- Figure 2
- a schematic partial section of Figure 1 in the region of the mixing chamber 13;
- Figure 3
- an enlarged section of the area of the supply of the
binder gas stream 6 to / into thenonwoven material layer 5 and - Figure 4
- a schematic view of the pre-metering of the binder and drive gas.
Gemäß Figur 1, 2 und 3 werden gerissene Baumwollfasern oder
anderes Vliesmaterial über einen als Zufuhrorgan 11 dienenden,
unten als Schlitzdüse zulaufenden Fülltrichter der Oberfläche
einer als Förderorgan 3 dienenden Förderwalze -auch "Karde"
genannt- zugeführt, deren Oberfläche rippenförmige Erhebungen
aufweist, wodurch das aufgedrückte Vliesmaterial 1 in Form
einer Vliesmaterialschicht 5 in Förderrichtung F nach links
weiterbefördert wird. Die Förderwalze dient auch als sog.
"Reißwalze", die Fasern aus der Schlitzdüse herausreißt.According to Figures 1, 2 and 3, torn cotton fibers or
other nonwoven material via a serving as a
Dort befindet sich eine Düse 8 mit der lichten Breite zwischen
10 und 25 mm als unterer Abschluß des Zuführorgans 12 für Bindemittel
2. Zur Düse 8 führt der Zuführkanal 9, durch den ein
Gas, insbesondere Luft, mit einer Geschwindigkeit von v = 20
bis 70 m/s Bindemittel 2 mit der Hauptströmungskomponente A
aus dem Zuführorgan 12 mit einer Strömungsgeschwindigkeit von
beispielsweise 50 m/sec ausstößt. An dieser Stelle des Auftreffens
des Bindemittel-Gas-Stromes 6 an und teilweise in die
Vliesmaterialschicht 5 weist diese eine Dicke von D = 1 cm
auf. Der Anstellwinkel α zwischen der Strömungskomponente A
und der Förderrichtung F der Vliesmaterialschicht 5 im Auftreffbereich
beträgt bevorzugt etwa 0 bis 5°. Dabei werden die
Bindemittelkörner geradezu zwischen die Fasern des Vliesmaterials
1 hineingerissen, so daß sich die Fördergeschwindigkeit
der Fasern erheblich erhöht. Da sich die lichte Breite des
Mischaggregats 13 in die Mischkammer 10 hinein erheblich vergrößert,
läßt dort die Strömungsgeschwindigkeit erheblich
nach, so daß die verwirbelten Bestandteile des Fasermaterial-Bindemittel-Zusatzstoffe-Gemisches
durch das als Siebtrommel
ausgebildete Vorschuborgan 14 unter Unterdruck an dessen Oberfläche
gezogen und von diesem in einen durch Leitbleche 15 gebildeten
Kanal hineingeschoben werden. Das Vorschuborgan 14
befördert die Gemischschicht dann auf ein als Transportorgan 4
ausgebildetes Transportband einer Breite von beispielsweise
2,5 m und einer Dicke von beispielsweise 5 cm. Das Transportorgan
4 transportiert das Band 7 der Gemischschicht zu einer
nicht dargestellten Verpressstation. Dort wird das Bindemittel
bis zum Erschmelzen erwärmt. Da das Bindemittelpulver bzw.
Bindemittelgranulat bereits gut mit den Fasern des Vliesmaterials
vermischt ist, genügen kurze Vliesstrecken, um beim Verpressen
und Verfestigen für eine gute und gleichmäßige Bindung
der Vliesmaterialteilchen und ggf. weiterer Zusatzstoffe untereinander
zu sorgen. There is a
In oder nach der Verpressstation kann das Band 7 weiterverformt
und/oder zu Vliesmatten geschnitten werden.The
Gemäß Figur 4 rieselt als Bindemittel 2 dienendes thermoplastisches
Phenolharz aus einem Sammelbehälter 16 nach unten, um
über eine Förderschnecke 17 zu einer Dosierschnecke 18 zu
gelangen, bei der eine Vordosierung stattfindet. Das Bindemittel
2 verläßt die Dosierschnecke 18 über einen Trichter auf
eine Dosierbandwaage 19, in der die Feindosierung erfolgt, um
von dort im freien Fall einem Zyklon 20 zugeführt zu werden,
in den Luft mit hoher Geschwindigkeit von bis zu 70 m/s zugeleitet
wird. Hier wird der Bindemittel-Gas-Strom 6 erzeugt und
dann über Verbindungskanäle dem Zuführorgan 12 der erfindungsgemäßen
Vorrichtung zugeführt zu werden. Anstelle einer breiten
Schlitzdüse 8 können auch mehrere, bei dem Beispiel nach
Figur 4, sieben Einzeldüsen über die Breite der Vliesmaterialschicht
5 verteilt werden.According to FIG. 4, thermoplastic serving as
Claims (10)
- A method for producing nonwovens, wherein a nonwoven material (1), fibrous in particular, is spread, together with a binder (2), granular in particular, and possibly other additives, on a transport organ (4), band-shaped in particular, and may be fed to a press-moulding station wherein the mixture of nonwoven material (1) and binder (2) and optionally additives, is press-moulded to form a nonwoven web or mat, in the heated condition in particular, wherein the nonwoven material (1) and the binder (2) are mixed in the presence of a gas flow which comprises a stream component (A) in the same direction as the movement of the nonwoven material (1),
characterized in that the nonwoven material (1) is moved forward in the form of a layer (5),
that the gas flow is mixed with the binder (2) into a binder-gas flow (6),
that the binder-gas flow (6) is blown onto and/or into the nonwoven material layer (5),
that the stream velocity of the binder-gas flow (6) is selected to be so high that binder (2) is entrained into the nonwoven layer (5) and the conveyance velocity of the nonwoven material (1) thereby increases. - A method according to claim 1,
characterized in that
the binder-gas flow (6) is blown, under high pressure, into a region of the spread-out nonwoven material layer (5) which comprises a low layer thickness (D) between about 0.1 and 30 cm and that, subsequently, the pressure is substantially reduced before the mixture of binder (2) and nonwoven material (1) is spread on a transport organ (4). - A method according to claim 1 or 2,
chracterized in that
the stream velocity of the binder-gas flow (6) is selected to be between 20 and 70 m/sec. - A method according to any of the preceding claims,
characterized in that
the setting angle α between the direction of conveyance (F) of the nonwoven material layer (5) and the binder-gas flow (6) is selected to be up to 20° at the site where it hits the nonwoven material layer (5). - A method according to any of the preceding claims,
characterized in that
the proportion of the binder (2) in relation to the nonwoven material (1) is dosed via a control of the binder addition to the gas flow. - A device for producing nonwovens with a method according to any of the preceding claims, comprising a feeding organ (11) for nonwoven material (1), comprising a feeding organ (12) for a binder (2) and possibly other additives, comprsing a nozzle (8) for feeding a gas flow and comprising a transport organ (4) with which the mixture of nonwoven material (1) and binder (2) and possibly other additives may be fed to a press-moulding station in the shape of a ribbon, in particular, wherein the mixture may be press-moulded to form a nonwoven web or mat, optionally under heating,
characterized in that a conveyor organ (3) conveys a layer (5) of the nonwoven material (1) in the direction of the nozzle (8), that the nozzle (8) blows a binder-gas stream (6) having a stream component (A) under a setting angle α of up to 60° with regard to the direction of movement (F) of the nonwoven material layer (8) in a mixed aggregate (13) for mixing with the nonwoven material (1) into the nonwoven material layer (5). - A device according to claim 6,
characterized in that the conveyor organ (3) is configured to be a conveyor roll. - A device according to claim 6 or 7,
characterized in that the nozzle (8) is disposed in the entry region of a mixing chamber (10) whose cross-section increases, in particular continuously, starting out from the nozzle area up to a feeding organ (14) which spreads the mixture of nonwoven material (1) and binder (2) and possibly other additives on the transport organ (4) as a ribbon (7). - A device according to any of claims 6 to 8,
characterized in that the binder (2) may be mixed, via a proportioning screw (18) and/or a balanced-weight belt (19), with the pressurized gas in a dosed manner in a cyclone aggregate (20) and reaches the feeding channel (9) under pressure from there. - A device according to any of claims 6 to 9,
characterized in that a plurality of nozzles (8) is distributed over the width of the nonwoven material layer (5).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10117864A DE10117864A1 (en) | 2001-04-10 | 2001-04-10 | The assembly for the production of a nonwoven, has a feed for a bonding agent to be delivered with a high speed gas stream into the fiber layer, to be formed into a web laid on a conveyor belt |
| DE10117864 | 2001-04-10 | ||
| PCT/EP2001/014823 WO2002084021A1 (en) | 2001-04-10 | 2001-12-14 | Method and device for producing nonwovens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1315862A1 EP1315862A1 (en) | 2003-06-04 |
| EP1315862B1 true EP1315862B1 (en) | 2004-02-04 |
Family
ID=7681078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01984852A Expired - Lifetime EP1315862B1 (en) | 2001-04-10 | 2001-12-14 | Method and device for producing nonwovens |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1315862B1 (en) |
| AT (1) | ATE259012T1 (en) |
| DE (3) | DE10117864A1 (en) |
| ES (1) | ES2210190T3 (en) |
| WO (1) | WO2002084021A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6802353B2 (en) | 2001-10-10 | 2004-10-12 | The Procter & Gamble Company | Apparatus for recycling waste from an absorbent article processing line |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2288072A (en) * | 1938-06-22 | 1942-06-30 | Owens Corning Fiberglass Corp | Method and apparatus for making bonded fibrous products |
| US2334572A (en) * | 1941-12-29 | 1943-11-16 | Carborundum Co | Manufacture of abrasive materials |
| DE2223683B2 (en) * | 1972-05-16 | 1975-01-23 | Vki-Rheinhold & Mahla Ag, 6800 Mannheim | Process and device for the production of MineraHaser random webs |
| US4018646A (en) * | 1973-05-09 | 1977-04-19 | Johnson & Johnson | Nonwoven fabric |
| GB2015604B (en) * | 1978-03-02 | 1982-06-03 | Kroyer K K K | Air laying bonded fibre structures |
| US4561380A (en) * | 1984-06-21 | 1985-12-31 | Nordson Corporation | Method and apparatus for powder coating a moving web |
| US4971742A (en) * | 1989-05-12 | 1990-11-20 | General Motors Corporation | Method and apparatus for forming a highly isotropic web structure |
| US5569489A (en) * | 1995-06-06 | 1996-10-29 | Kasmark, Jr.; James W. | Machine and method of making a filter |
-
2001
- 2001-04-10 DE DE10117864A patent/DE10117864A1/en not_active Withdrawn
- 2001-05-18 DE DE20108379U patent/DE20108379U1/en not_active Expired - Lifetime
- 2001-12-14 WO PCT/EP2001/014823 patent/WO2002084021A1/en not_active Application Discontinuation
- 2001-12-14 EP EP01984852A patent/EP1315862B1/en not_active Expired - Lifetime
- 2001-12-14 ES ES01984852T patent/ES2210190T3/en not_active Expired - Lifetime
- 2001-12-14 DE DE50101455T patent/DE50101455D1/en not_active Expired - Lifetime
- 2001-12-14 AT AT01984852T patent/ATE259012T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP1315862A1 (en) | 2003-06-04 |
| ES2210190T3 (en) | 2004-07-01 |
| DE10117864A1 (en) | 2002-10-17 |
| DE50101455D1 (en) | 2004-03-11 |
| ATE259012T1 (en) | 2004-02-15 |
| DE20108379U1 (en) | 2002-08-14 |
| WO2002084021A1 (en) | 2002-10-24 |
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