EP2716813B1 - Paper machine fabric - Google Patents

Paper machine fabric Download PDF

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Publication number
EP2716813B1
EP2716813B1 EP13180585.5A EP13180585A EP2716813B1 EP 2716813 B1 EP2716813 B1 EP 2716813B1 EP 13180585 A EP13180585 A EP 13180585A EP 2716813 B1 EP2716813 B1 EP 2716813B1
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EP
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Prior art keywords
threads
paper machine
bioplastic
bio
machine belt
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EP13180585.5A
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German (de)
French (fr)
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EP2716813A1 (en
Inventor
Rex Barrett
Alister John Dr. Rigby
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Heimbach GmbH and Co KG
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Heimbach GmbH and Co KG
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Publication of EP2716813A1 publication Critical patent/EP2716813A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths

Definitions

  • the invention relates to a papermaking belt.
  • Papermaking belts are endless or seam-finished long-length and wide-width fabrics which are adapted in design and choice of materials to the specific requirements of a paper machine.
  • the paper machine belts circulate in the paper machine and thereby support the paper web forming in the paper machine as it passes through the paper machine and thereby facilitate and promote the dewatering process. It can be distinguished according to their location three basic types of paper machine belts.
  • the Formierpartie single or multi-ply fabrics are used, on which the paper pulp is applied so that forms a paper web. Their drainage takes place under the influence of gravity and by the action of suction boxes applied vacuum through the forming fabric. Forming screens must therefore be very permeable on the one hand and on the other hand have good fiber retention on the outside.
  • the press section the paper web is taken over by press felts and passed through roller presses, the liquid still contained in the paper web being pressed out under the pressure of a press and is pushed through the press felt. Press felts basically have a carrier in the form of a thread system onto which one or more Fiber layers are pinned.
  • the thread system may be a woven fabric, knitted fabric or a thread scrim. Also known are combinations of such thread systems.
  • the press section is followed by the dryer section, in which the paper web is transferred to drying screens, which guide the paper web over hot rolls. The drainage takes place here thermally. Dryers are usually made of an open fabric or a wire link belt (to the genus: EP 0 171 891 A1 . EP 0 472 072 A1 and EP 0 763 623 B1 ).
  • shoe press belts which are made of a carrier, consisting for example of a fabric or a scrim, and an applied thereon, impermeable polymer layer.
  • papermaking belts have been manufactured exclusively from plastics based on fossil fuels, such as polyethylene, polypropylene, polyamide, polyester, polyethylene terephthalate, polyether ether ketone, and the like.
  • plastics such as polyethylene, polypropylene, polyamide, polyester, polyethylene terephthalate, polyether ether ketone, and the like.
  • the amount of consumption of such plastics is quite considerable, since paper machine belts have only a lifetime of a few months due to the unfavorable environmental conditions in the paper machine and then have to be replaced by new belts.
  • the fossil raw materials used for polymer plastics in particular the petrochemical raw materials such as mineral oil, are running out. Since mineral oil for the production of fuels can not yet be replaced, there is a general need to conserve mineral oil deposits as far as possible and to reserve them for those uses for which they are still indispensable.
  • a papermaking belt which contains solid bodies which at least partially consist of a biodegradable material, in particular at least one biodegradable polymer.
  • the purpose of this measure is to generate a biodegradation process during the life of the strip to compensate for added or degraded void volume.
  • warp or weft threads, filling threads, filaments, yarns and threads are also considered as solid bodies.
  • the invention has for its object to provide for papermaking belts materials that are used to replace the previously used for paper machine belts, based on petrochemical raw materials plastics.
  • the papermaking belt has or consists of a thread system with threads, wherein a part of the threads or all threads partially or entirely consist of a bioplastic, and wherein the bioplastic is not biodegradable and using one or more renewable Raw materials, especially vegetable raw materials, is produced.
  • a contribution to the conservation of fossil resources is made.
  • bioplastics are less problematic to landfill and their material is largely recoverable for re-use.
  • biopolymers are particularly suitable for use in the paper machine.
  • plastics that are based on starch, especially thermoplastic starch.
  • the raw material for starch can be corn, wheat, potato or tapioca.
  • a water-resistant starch plastic should be used, as it is, for example, from the EP 0 596 437 A2 .
  • WO 02/051284 A2 or WO 96/19599 A1 results.
  • Another raw material is cellulose, which is further processed, for example, by esterification.
  • cellulosic polymers are the JP 2009-138022 A1 , of the JP 2003-082160 A1 , of the WO 2011/097700 A1 .
  • JP 2004-010844 JP 2004-131670 A1 , of the JP 2003-335898 A1 and the CN 101 492 837 A1 refer to.
  • polylactic acid also called polylactic acid (PLA)
  • PLA polylactic acid
  • PDO 1,3-propanediol
  • PTT polytrimethylene terephthalate
  • bio-based polyamide PA
  • PHA polyhydroxyalkanoate
  • biopolymers are polyvinyl chloride (PVC) from bio-based ethene or ethyne, bio-based polybutylene terephthalate (PBT), eg mentioned in US Pat US 2010/0168371 A1 and the WO 2010/078328 A2 , Polyphenylene sulfide (PPS), polyethylene terephthalate (PET), for example described in the WO 2010/101698 A2 , of the CN 101525416 A1 , of the WO 2010/078328 A2 , of the US 2010/0168371 A1 and the WO 2009/120457 A2 Polyethylene co-isosorbide terephthalate polymer (PEIT), 1,3-propanediol-based polyester, mentioned for example in US Pat US 2010/0168371 A1 .
  • PVC polyvinyl chloride
  • PBT polybutylene terephthalate
  • PPS polyphenylene sulfide
  • PET polyethylene
  • WO 2010/078328 A2 and the WO 2008/088501 A1 as well as polyurethane (PUR), which is based on bio-based polyols and bio-based isocyanates.
  • PUR polyurethane
  • the prior art documents cited are incorporated herein by reference in their entirety. This applies in particular to the manufacturing processes described in the publications and also to the combinations with other materials and raw materials. It is understood that the aforementioned bioplastics or raw materials - where possible - for each other or - if required by the requirements - can be mixed with the known, mineral oil-based plastics, for example, to form compounds or blends.
  • the thread system can be formed as a woven, knitted fabric or scrim, or as a wire link band and combinations thereof.
  • threads may be present, which are formed as monofilaments - including wires - and / or as multifilaments or threads.
  • both fibers of bioplastics and fibers of mineral oil-based plastics can be used.
  • the thread system may also have multiple layers, wherein at least one layer contains or consists of threads that consist partially or entirely of a bioplastic.
  • combinations of bioplastic and petrochemical plastics are possible by, for example, the one layer of a bioplastic and the other layer are made of a petrochemical plastic or both layers of a combination of both types of plastics. If the environmental conditions in the paper machine allow it, both layers should be one for each be made suitable bioplastics in order to dispense as much as possible on petrochemical plastics.
  • a layer of the thread system as a woven or knitted fabric and a further layer as a scrim may be formed, in which the threads are superimposed and not interwoven or forfeited.
  • threads may be present in the thread system, which consist partly of the bioplastic and partly of a petrochemical plastic by both plastics are mixed as a compound or blend and / or a part of the threads of bioplastic and another part of petrochemical plastic are made. This can be done, for example, in the form that the threads are formed as core-sheath threads and that the core of the bioplastic and the shell of the petrochemical plastic or vice versa are made.
  • threads may also be present which are designed as multifilament threads and / or twines, wherein a part of the filaments may consist of the bioplastic and a part of the filaments of the petrochemical plastic.
  • the paper machine belt is provided with a coating and the coating consists partially or entirely of a bioplastic, for example one of the bioplastics described in more detail above.
  • the papermaking belt can also be provided with a fiber layer, wherein the fiber layer consists partly or entirely of a bioplastic.
  • the paper machine belt described above may preferably be formed as a forming fabric, press felt or dryer fabric.

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  • Paper (AREA)
  • Woven Fabrics (AREA)

Description

Die Erfindung betrifft ein Papiermaschinenband. Papiermaschinenbänder sind endlose oder über eine Naht endlos gemachte Textilerzeugnisse großer Länge und großer Breite, die in ihrem Aufbau und in der Materialwahl an die spezifischen Anforderungen in einer Papiermaschine angepasst sind. Die Papiermaschinenbänder laufen in der Papiermaschine um und unterstützen dabei die in der Papiermaschine sich bildende Papierbahn beim Durchlauf durch die Papiermaschine und ermöglichen und fördern dabei den Entwässerungsprozess. Dabei können entsprechend ihrem Einsatzort drei Grundtypen von Papiermaschinenbändern unterschieden werden.The invention relates to a papermaking belt. Papermaking belts are endless or seam-finished long-length and wide-width fabrics which are adapted in design and choice of materials to the specific requirements of a paper machine. The paper machine belts circulate in the paper machine and thereby support the paper web forming in the paper machine as it passes through the paper machine and thereby facilitate and promote the dewatering process. It can be distinguished according to their location three basic types of paper machine belts.

Im ersten Teil der Papiermaschine, der Formierpartie, werden ein- oder mehrlagige Gewebe verwendet, auf die die Papierpulpe derart aufgebracht wird, dass sich eine Papierbahn ausbildet. Ihre Entwässerung erfolgt unter Schwerkrafteinfluss und durch Einwirkung von mittels Saugkästen aufgebrachtem Unterdruck durch das Formiersieb. Formiersiebe müssen deshalb einerseits sehr durchlässig sein und andererseits eine gute Faserretention auf deren Außenseite aufweisen. In dem nachfolgenden Abschnitt der Papiermaschine, der Pressenpartie, wird die Papierbahn von Pressfilzen übernommen und durch Walzenpressen hindurchgeführt, wobei die in der Papierbahn noch enthaltene Flüssigkeit unter Pressendruck herausgepresst und durch den Pressfilz hindurchgedrückt wird. Pressfilze weisen grundsätzlich einen Träger in Form eines Fadensystems auf, auf das eine oder mehrere Faserschichten aufgenadelt sind. Das Fadensystem kann ein Gewebe, Gewirke oder ein Fadengelege sein. Bekannt sind auch Kombinationen solcher Fadensysteme. Auf die Pressenpartie folgt die Trockenpartie, in der die Papierbahn auf Trockensiebe übergeben wird, die die Papierbahn über heiße Walzen führt. Die Entwässerung erfolgt hier thermisch. Trockensiebe bestehen in der Regel aus einem offenen Gewebe oder aus einem Drahtgliederband (zur Gattung: EP 0 171 891 A1 , EP 0 472 072 A1 und EP 0 763 623 B1 ). Daneben gibt es noch weitere Formen von Papiermaschinenbändern, beispielsweise sogenannte Schuhpressenbänder, welche aus einem Träger, bestehend z.B. aus einem Gewebe oder einem Fadengelege, und einer darauf aufgebrachten, undurchlässigen Polymerschicht hergestellt sind.In the first part of the paper machine, the Formierpartie, single or multi-ply fabrics are used, on which the paper pulp is applied so that forms a paper web. Their drainage takes place under the influence of gravity and by the action of suction boxes applied vacuum through the forming fabric. Forming screens must therefore be very permeable on the one hand and on the other hand have good fiber retention on the outside. In the subsequent section of the paper machine, the press section, the paper web is taken over by press felts and passed through roller presses, the liquid still contained in the paper web being pressed out under the pressure of a press and is pushed through the press felt. Press felts basically have a carrier in the form of a thread system onto which one or more Fiber layers are pinned. The thread system may be a woven fabric, knitted fabric or a thread scrim. Also known are combinations of such thread systems. The press section is followed by the dryer section, in which the paper web is transferred to drying screens, which guide the paper web over hot rolls. The drainage takes place here thermally. Dryers are usually made of an open fabric or a wire link belt (to the genus: EP 0 171 891 A1 . EP 0 472 072 A1 and EP 0 763 623 B1 ). In addition, there are other forms of paper machine belts, for example so-called shoe press belts, which are made of a carrier, consisting for example of a fabric or a scrim, and an applied thereon, impermeable polymer layer.

Früher wurden die Fadensysteme solcher Papiermaschinenbänder aus Wolle oder Baumwolle hergestellt. Deren mechanische Eigenschaften waren jedoch so eingeschränkt, dass sie mit der weiteren Entwicklung der Papiermaschinen nicht schritthalten konnten. Seit mehreren Jahrzehnten werden deshalb Papiermaschinenbänder ausschließlich aus Kunststoffen hergestellt, die auf fossilen Rohstoffen basieren, wie Polyethylen, Polypropylen, Polyamid, Polyester, Polyethylenterephthalat, Polyetheretherketon und dergleichen. Dabei ist der Mengenverbrauch an solchen Kunststoffen durchaus beachtlich, da Papiermaschinenbänder wegen der ungünstigen Umgebungsbedingungen in der Papiermaschine nur eine Lebensdauer von einigen Monaten haben und dann gegen neue Bänder ausgetauscht werden müssen.Previously, the thread systems of such papermaking belts were made of wool or cotton. However, their mechanical properties were so limited that they could not keep pace with the further development of paper machines. For several decades, therefore, papermaking belts have been manufactured exclusively from plastics based on fossil fuels, such as polyethylene, polypropylene, polyamide, polyester, polyethylene terephthalate, polyether ether ketone, and the like. The amount of consumption of such plastics is quite considerable, since paper machine belts have only a lifetime of a few months due to the unfavorable environmental conditions in the paper machine and then have to be replaced by new belts.

Die für polymere Kunststoffe verwendeten fossilen Rohstoffe, insbesondere die petrochemischen Rohstoffe wie Mineralöl, gehen zur Neige. Da Mineralöl für die Herstellung von Treibstoffen noch nicht ersetzt werden kann, besteht ein allgemeines Bedürfnis, die Mineralölvorkommen so weit wie möglich zu schonen und denjenigen Anwendungen vorzubehalten, für die sie noch unverzichtbar sind.The fossil raw materials used for polymer plastics, in particular the petrochemical raw materials such as mineral oil, are running out. Since mineral oil for the production of fuels can not yet be replaced, there is a general need to conserve mineral oil deposits as far as possible and to reserve them for those uses for which they are still indispensable.

Aus der DE 20 2008 016 863 U1 ist ein Papiermaschinenband bekannt, das Volumenkörper enthält, die zumindest teilweise aus einem biologisch abbaubaren Material, insbesondere zumindest einem biologisch abbaubaren Polymer bestehen. Sinn dieser Maßnahme ist es, einen biologischen Abbauprozess während der Betriebsdauer des Bandes zu generieren, um zugesetztes oder abgebautes Hohlraumvolumen zu kompensieren. Als Volumenkörper kommen dabei auch Kett- oder Schussfäden, Füllfäden, Filamente, Garne und Zwirne in Frage.From the DE 20 2008 016 863 U1 For example, a papermaking belt is known which contains solid bodies which at least partially consist of a biodegradable material, in particular at least one biodegradable polymer. The purpose of this measure is to generate a biodegradation process during the life of the strip to compensate for added or degraded void volume. In this case, warp or weft threads, filling threads, filaments, yarns and threads are also considered as solid bodies.

Der Erfindung liegt die Aufgabe zugrunde, für Papiermaschinenbänder Materialien vorzusehen, die die bisher für Papiermaschinenbänder verwendeten, auf petrochemischen Rohstoffen basierenden Kunststoffe zu ersetzen in der Lage sind.The invention has for its object to provide for papermaking belts materials that are used to replace the previously used for paper machine belts, based on petrochemical raw materials plastics.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass das Papiermaschinenband ein Fadensystem mit Fäden aufweist oder daraus besteht, wobei ein Teil der Fäden oder sämtliche Fäden teilweise oder ganz aus einem Biokunststoff bestehen, und wobei der Biokunststoff nicht biologisch abbaubar und unter Verwendung von einem oder mehreren nachwachsenden Rohstoffen, insbesondere pflanzlichen Rohstoffen, hergestellt ist. Durch Verwendung solcher Kunststoffe wird ein Beitrag zur Schonung der fossilen Ressourcen geleistet. Außerdem sind Biokunststoffe unproblematischer zu deponieren, und ihr Material lässt sich größtenteils zur erneuten Verwendung wiedergewinnen.This object is achieved in that the papermaking belt has or consists of a thread system with threads, wherein a part of the threads or all threads partially or entirely consist of a bioplastic, and wherein the bioplastic is not biodegradable and using one or more renewable Raw materials, especially vegetable raw materials, is produced. By using such plastics, a contribution to the conservation of fossil resources is made. In addition, bioplastics are less problematic to landfill and their material is largely recoverable for re-use.

Für den Einsatz in der Papiermaschine eignen sich insbesondere die nachstehenden Biopolymere. So kommen Kunststoffe infrage, die auf Stärke, insbesondere thermoplastischet Stärke basieren. Der Rohstoff für Stärke kann sein Mais, Weizen, Kartoffel oder Tapioka. Dabei sollte ein wasserfester Stärkekunststoff verwendet werden, wie er sich beispielsweise aus der EP 0 596 437 A2 , WO 02/051284 A2 oder WO 96/19599 A1 ergibt.The following biopolymers are particularly suitable for use in the paper machine. So are plastics that are based on starch, especially thermoplastic starch. The raw material for starch can be corn, wheat, potato or tapioca. In this case, a water-resistant starch plastic should be used, as it is, for example, from the EP 0 596 437 A2 . WO 02/051284 A2 or WO 96/19599 A1 results.

Ein weiterer Rohstoff ist Cellulose, das beispielsweise mittels Veresterung weiter verarbeitet wird. Beispiele für Cellulosepolymere sind der JP 2009-138022 A1 , der JP 2003-082160 A1 , der WO 2011/097700 A1 , JP 2004-010844 , JP 2004-131670 A1 , der JP 2003-335898 A1 und der CN 101 492 837 A1 zu entnehmen.Another raw material is cellulose, which is further processed, for example, by esterification. Examples of cellulosic polymers are the JP 2009-138022 A1 , of the JP 2003-082160 A1 , of the WO 2011/097700 A1 . JP 2004-010844 . JP 2004-131670 A1 , of the JP 2003-335898 A1 and the CN 101 492 837 A1 refer to.

Ein weiterer geeigneter Biokunststoff stellt Polymilchsäure, auch Polylactidsäure (PLA) genannt, dar, wie sie beispielsweise in der WO 02/051284 A2 sowie in der WO 2011/097700 A1 zwecks Herstellung von Fasern und textilen Fäden beschrieben ist, aber auch in der JP 2003-082160 A1 , der JP 2008-223177A1 und der JP 2008-297680 A1 . Ebenfalls geeignet ist auf 1,3-Propandiol (PDO) basierendes Polytrimethylenterephthalat (PTT), wie es sich beispielsweise aus der WO 2010/078328 A2 , der US 2010/0168372 A1 , der JP 2008-223177 A1 und JP 2008-297680 A1 ergibt.Another suitable bioplastic is polylactic acid, also called polylactic acid (PLA), as described for example in the WO 02/051284 A2 as well as in the WO 2011/097700 A1 for the production of fibers and textile threads is described, but also in the JP 2003-082160 A1 , of the JP 2008-223177A1 and the JP 2008-297680 A1 , Likewise suitable is 1,3-propanediol (PDO) -based polytrimethylene terephthalate (PTT), as is known, for example, from US Pat WO 2010/078328 A2 , of the US 2010/0168372 A1 , of the JP 2008-223177 A1 and JP 2008-297680 A1 results.

Ein gleichfalls geeigneter Biokunststoff ist biobasiertes Polyamid (PA), wie es beispielsweise in der JP 2010-222721 A1 , der WO 2011/094673 A2 , der WO 2011/066619 A1 oder der WO 2011/066620 A1 beschrieben ist. Entsprechendes gilt für Polyhydroxyalkanoat (PHA), wie es z.B. in der JP 2008-223177 A1 und der JP 2008-297680 offenbart ist, sowie biobasiertes Polyethylen (PE).An equally suitable bioplastic is bio-based polyamide (PA), as for example in the JP 2010-222721 A1 , of the WO 2011/094673 A2 , of the WO 2011/066619 A1 or the WO 2011/066620 A1 is described. The same applies to polyhydroxyalkanoate (PHA), as described, for example, in US Pat JP 2008-223177 A1 and the JP 2008-297680 as well as bio-based polyethylene (PE).

Ebenfalls geeignete Biopolymere sind Polyvinylchlorid (PVC) aus biobasiertem Ethen oder Ethin, biobasiertes Polybutylenterephthalat (PBT), z.B. erwähnt in der US 2010/0168371 A1 und der WO 2010/078328 A2 , Polyphenylensulfid (PPS), Polyethylenterephthalat (PET), z.B. beschrieben in der WO 2010/101698 A2 , der CN 101525416 A1 , der WO 2010/078328 A2 , der US 2010/0168371 A1 und der WO 2009/120457 A2 , Polyethylen-co-isosorbid Terephthalatpolymer (PEIT), auf 1,3-Propandiol basierendes Polyester, z.B. erwähnt in der US 2010/0168371 A1 , WO 2010/078328 A2 und der WO 2008/088501 A1 , sowie Polyurethan (PUR), das auf biobasierten Polyolen und biobasierten Isocyanaten aufbaut.
Die vorzitierten Dokumente zum Stand der Technik werden vollinhaltlich zum Inhalt der vorliegenden Beschreibung gemacht. Dies gilt insbesondere für die in den Druckschriften dargestellten Herstellungsprozesse und auch die Kombinationen mit jeweils anderen Materialien und Rohstoffen. Es versteht sich, dass die vorgenannten Biokunststoffe bzw. Rohstoffe - soweit möglich - dafür auch miteinander oder - sofern es die Anforderungen bedingen - mit den bekannten, mineralölbasierten Kunststoffen vermischt werden können, z.B. unter Bildung von Compounds oder Blends.Also suitable biopolymers are polyvinyl chloride (PVC) from bio-based ethene or ethyne, bio-based polybutylene terephthalate (PBT), eg mentioned in US Pat US 2010/0168371 A1 and the WO 2010/078328 A2 , Polyphenylene sulfide (PPS), polyethylene terephthalate (PET), for example described in the WO 2010/101698 A2 , of the CN 101525416 A1 , of the WO 2010/078328 A2 , of the US 2010/0168371 A1 and the WO 2009/120457 A2 Polyethylene co-isosorbide terephthalate polymer (PEIT), 1,3-propanediol-based polyester, mentioned for example in US Pat US 2010/0168371 A1 . WO 2010/078328 A2 and the WO 2008/088501 A1 , as well as polyurethane (PUR), which is based on bio-based polyols and bio-based isocyanates.
The prior art documents cited are incorporated herein by reference in their entirety. This applies in particular to the manufacturing processes described in the publications and also to the combinations with other materials and raw materials. It is understood that the aforementioned bioplastics or raw materials - where possible - for each other or - if required by the requirements - can be mixed with the known, mineral oil-based plastics, for example, to form compounds or blends.

Das Fadensystem kann als Gewebe, Gewirke oder Fadengelege oder auch als Drahtgliederband sowie aus Kombinationen davon ausgebildet werden. In dem Fadensystem können Fäden vorhanden sein, die als Monofilamente - auch Drähte - und/oder als Multifilamente oder Zwirne ausgebildet sind. Für Multifilamente können sowohl Fasern aus Biokunststoffen als auch Fasern aus mineralölbasierten Kunststoffen verwendet werden.
Das Fadensystem kann auch mehrere Lage aufweisen, wobei zumindest eine Lage Fäden enthält oder daraus besteht, die teilweise oder ganz aus einem Biokunststoff bestehen. Auch hier sind Kombinationen aus Biokunststoff und petrochemischen Kunststoffen möglich, indem beispielsweise die eine Lage aus einem Biokunststoff und die andere Lage aus einem petrochemischen Kunststoff gefertigt werden oder beide Lagen aus einer Kombination beider Arten von Kunststoffen. Wenn die Umgebungsbedingungen in der Papiermaschine es erlauben, sollten beide Lagen aus einem jeweils dafür geeigneten Biokunststoff hergestellt sein, um möglichst weitgehend auf petrochemische Kunststoffe verzichten zu können.The thread system can be formed as a woven, knitted fabric or scrim, or as a wire link band and combinations thereof. In the thread system threads may be present, which are formed as monofilaments - including wires - and / or as multifilaments or threads. For multifilaments both fibers of bioplastics and fibers of mineral oil-based plastics can be used.
The thread system may also have multiple layers, wherein at least one layer contains or consists of threads that consist partially or entirely of a bioplastic. Again, combinations of bioplastic and petrochemical plastics are possible by, for example, the one layer of a bioplastic and the other layer are made of a petrochemical plastic or both layers of a combination of both types of plastics. If the environmental conditions in the paper machine allow it, both layers should be one for each be made suitable bioplastics in order to dispense as much as possible on petrochemical plastics.

Wie bei bekannten Papiermaschinenbändern kann dabei auch eine Lage des Fadensystems als Gewebe oder Gewirke und eine weitere Lage als Fadengelege ausgebildet sein, bei der die Fäden übereinandergelegt und nicht miteinander verwoben oder verwirkt sind.As with known papermaking machine belts, a layer of the thread system as a woven or knitted fabric and a further layer as a scrim may be formed, in which the threads are superimposed and not interwoven or forfeited.

Wie schon erwähnt, können in dem Fadensystem Fäden vorhanden sein, die teilweise aus dem Biokunststoff und teilweise aus einem petrochemischen Kunststoff bestehen, indem beide Kunststoffe als Compound oder Blend vermischt sind und/oder ein Teil der Fäden aus Biokunststoff und ein anderer Teil aus petrochemischem Kunststoff hergestellt sind. Dies kann beispielsweise in der Form geschehen, dass die Fäden als Kern-Mantel-Fäden ausgebildet sind und dass der Kern aus dem Biokunststoff und der Mantel aus dem petrochemischen Kunststoff oder umgekehrt hergestellt sind. Es können jedoch auch Fäden vorhanden sein, die als Multifilamentfäden und/oder Zwirnen ausgebildet sind, wobei ein Teil der Filamente aus dem Biokunststoff und ein Teil der Filamente aus dem petrochemischen Kunststoff bestehen können.As already mentioned, threads may be present in the thread system, which consist partly of the bioplastic and partly of a petrochemical plastic by both plastics are mixed as a compound or blend and / or a part of the threads of bioplastic and another part of petrochemical plastic are made. This can be done, for example, in the form that the threads are formed as core-sheath threads and that the core of the bioplastic and the shell of the petrochemical plastic or vice versa are made. However, threads may also be present which are designed as multifilament threads and / or twines, wherein a part of the filaments may consist of the bioplastic and a part of the filaments of the petrochemical plastic.

In Sonderheit kann das Papiermaschinenband als Formiersieb ausgebildet sein, das in der Formiersektion zur Ausbildung der Papierbahn einzusetzen ist. Dabei sollten diejenigen Fäden, die teilweise oder ganz aus dem Biokunststoff bestehen, Eigenschaften in folgenden Bereichen haben:

  • Fadendurchmesser: 0,08 - 0,5 mm;
  • Zugkraft: 2 - 110 N;
  • Fadendehnung beim Bruch: 10 - 32%;
  • Fadenelastizitätsmodul: 80 - 9250 N/mm2.
In particular, the papermaking belt may be formed as a forming fabric to be used in the forming section for forming the paper web. In this case, those threads which consist partly or entirely of the bioplastic should have properties in the following areas:
  • Thread diameter: 0.08 - 0.5 mm;
  • Tensile force: 2 - 110 N;
  • Thread elongation at break: 10 - 32%;
  • Thread elastic modulus: 80 - 9250 N / mm 2 .

In weiterer Ausgestaltung der Erfindung ist vorgesehen, dass das Papiermaschinenband mit einer Beschichtung versehen ist und die Beschichtung teilweise oder ganz aus einem Biokunststoff besteht, beispielsweise einem der vorstehend näher bezeichneten Biokunststoffe. Unabhängig davon kann das Papiermaschinenband auch mit einer Faserschicht versehen sein, wobei die Faserschicht teilweise oder ganz aus einem Biokunststoff besteht.In a further embodiment of the invention, it is provided that the paper machine belt is provided with a coating and the coating consists partially or entirely of a bioplastic, for example one of the bioplastics described in more detail above. Independently of this, the papermaking belt can also be provided with a fiber layer, wherein the fiber layer consists partly or entirely of a bioplastic.

Das vorbeschriebene Papiermaschinenband kann vorzugsweise als Formiersieb, Pressenfilz oder Trockensieb ausgebildet sein.The paper machine belt described above may preferably be formed as a forming fabric, press felt or dryer fabric.

Claims (10)

  1. A paper machine belt that has a thread system with threads or is made of the latter, wherein some of the threads or all of the threads are made partially or entirely of a bioplastic, and wherein the bioplastic is not biologically degradable and is produced using one or more renewable raw materials, in particular plant raw materials.
  2. The paper machine belt according to claim 1, characterised in that the bioplastic or its raw material is chosen from a group that consists of starch, cellulose polymer, polylactic acid (PLA), polytrimethylene terephthalate (PTT) made of bio-based 1,3-propanediol (PDO), bio-based polyamide (PA), polyhydroxyalkanoate (PHA), bio-based polyethylene (PE), polyvinyl chloride (PVC) made of bio-based ethene or ethyne, bio-based polybutylene terephthalate (PBT), bio-based polyphenylene sulfide (PPS), bio-based polyethylene terephthalate (PET), bio-based polyethylene-co-isosorbide terephthalate polymer (PEIT), polyurethane (PUR) made of bio-based polyol and/or bio-based isocyanate.
  3. The paper machine belt according to claim 1 or 2, characterised in that the thread system forms one or more woven or knitted fabrics or non-woven yarn layers or combinations of the latter and/or a wire-link band.
  4. The paper machine belt according to any of claims 1 to 3, characterised in that there are threads in the thread system which are in the form of monofilaments and/or multifilaments.
  5. The paper machine belt according to any of claims 1 to 4, characterised in that the thread system has a number of layers and that at least one layer contains threads or consists of threads which are made partially or entirely of a bioplastic.
  6. The paper machine belt according to any of claims 1 to 5, characterised in that the thread system has a number of layers and that at least one layer contains threads which are made partially or entirely of a petrochemical plastic.
  7. The paper machine belt according to claim 5 or 6, characterised in that one layer of the thread system is in the form of a woven fabric and a further layer is in the form of a non-woven layer.
  8. The paper machine belt according to any of claims 1 to 7, characterised in that there are threads within the thread system which are partially made of the bioplastic and partially of a petrochemical plastic.
  9. The paper machine belt according to claim 8, characterised in that the threads are in the form of core/sheath threads, wherein the core is made of the bioplastic and the core of the petrochemical plastic or vice versa, or there are threads in the thread system which are in the form of multifilament threads or yarns, some of the filaments being made of the bioplastic and some of the filaments being made of the petrochemical plastic.
  10. The paper machine belt according to any of claims 1 to 9, characterised in that the paper machine belt is provided with a coating and the coating is made partially or entirely of a bioplastic and/or the paper machine belt is provided with a fibre layer and the fibre layer is made partially or entirely of a bioplastic.
EP13180585.5A 2012-10-08 2013-08-15 Paper machine fabric Active EP2716813B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202012103846U DE202012103846U1 (en) 2012-10-08 2012-10-08 The paper machine belt

Publications (2)

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EP2716813A1 EP2716813A1 (en) 2014-04-09
EP2716813B1 true EP2716813B1 (en) 2017-05-03

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Application Number Title Priority Date Filing Date
EP13180585.5A Active EP2716813B1 (en) 2012-10-08 2013-08-15 Paper machine fabric

Country Status (6)

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US (1) US20140096928A1 (en)
EP (1) EP2716813B1 (en)
CN (1) CN103710791A (en)
DE (1) DE202012103846U1 (en)
ES (1) ES2635611T3 (en)
PT (1) PT2716813T (en)

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Also Published As

Publication number Publication date
PT2716813T (en) 2017-05-30
EP2716813A1 (en) 2014-04-09
DE202012103846U1 (en) 2012-10-25
CN103710791A (en) 2014-04-09
US20140096928A1 (en) 2014-04-10
ES2635611T3 (en) 2017-10-04

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